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The 10 Best Travel-sized Carbon Monoxide Detectors of 2024

Monitor your safety wherever you go with these portable travel-sized carbon monoxide detectors.

In This Article

• Our Top Picks
• Tips for Buying

Frequently Asked Questions

• Why Trust T+L

Travel + Leisure / Brian Kopinski

Before every trip, the main things you’re likely to check are that your suitcase is packed with clothes, shoes, and toiletries, and that your carry-on has your passport, phone, and laptop. But one thing you are likely missing is a portable carbon monoxide detector. While you may already have one in your home, have you ever thought about bringing a carbon monoxide detector on the road? There have been a number of instances when hotel or vacation-home rental guests have gotten sick or passed away from carbon monoxide poisoning. The gas is odorless and tasteless, which is why it's crucial to have a detector on hand.

"When renting a home or staying at a new place, travelers should ensure that there are working carbon monoxide detectors and smoke alarms for their safety," says John D'Alessandro, association secretary at the Firefighters Association of the State of New York (FASNY). "Often, vacation home rental sites will list safety amenities — if this information is not provided, make sure to double check with your host so you can be prepared with your own portable carbon monoxide detector."

Most carbon monoxide leaks come from fuel-burning sources like furnaces or gas stoves. And, while you might not find those in many hotel rooms, D'Alessandro notes that improperly vented pool or spa heaters in hotels can also be sources of carbon monoxide leaks. "Carbon monoxide can spread quickly, so rooms near these amenities can be affected," he says. In order to stay safe, we’ve selected our favorite portable carbon monoxide detectors so bring along on your next trip.

Best Overall

Kidde carbon monoxide detector.

This option is lightweight and very easy to use.

It doesn’t give specific PPM levels.

The Kidde Carbon Monoxide Detector is our top pick for the best travel-sized carbon monoxide detector for a variety of reasons. To start, it’s incredibly lightweight and easy to pack. It’s also very easy to use thanks to the simple one-button display — so you won’t have to mess around trying to figure out if your device is working. We also really like that this option can be placed on a table top like a hotel nightstand and doesn’t beep throughout the night unless it detects a rise in carbon monoxide levels. The only thing we don’t love about this model is that it doesn’t state specific PPM levels — but if you’re just using it for safety rather than monitoring it should be fine.

The Details: ‎‎‎‎‎1.5 x 4.5 x 2.75 inches | AA batteries | 10-year limited warranty

Best Budget

Usbnovel mini carbon monoxide detector alarm.

It’s budget-friendly and highly portable.

The constant flashing light might be annoying to some.

You don’t need to spend a ton on a carbon monoxide detector in order to get something that’ll work (but you’ll still want to do your research before buying the cheapest option). The USB Novel Mini Carbon Monoxide Detector Alarm is only about $10 but offers the same protection as more expensive options on the list. It reads up to 300 PPM — which doesn’t compete with some expensive models — but since about 70 PPM is enough to signal a problem, it’s more than enough to keep you safe and allow you to monitor your surroundings.

The Details: ‎‎‎‎‎‎‎‎‎‎4.02 x 3.9 x 1.46 inches | 3 AAA batteries | 0 to 300 PPM | ‎30-day warranty

Most Portable

Toxin sensors carbon monoxide detector.

Alarms increase in duration and frequency as more carbon monoxide is detected.

It’s a bit pricey compared to other options.

Looking for something small enough to slip into your backpack or carry-on bag? The Toxin Sensors Carbon Monoxide Detector is going to be your best option by a long shot. At less than 3.5 inches long, it’s tiny plus comes equipped with a built-in lanyard (or a sun visor clip ) so you can pop it right onto your backpack. There’s no display or insights on the detector itself, but the alarm starts at 25 PPM with progressive alarms that go up to 400 PPM so you’ll always know if there’s a shift in the air quality. Keep in mind that this option is admittedly a bit pricey, but it’s made in the United States and features an impressive 10-year sensor life.

The Details: ‎‎‎‎‎3.35 x 1.89 x 0.71 inches | CR2032 lithium battery | 0 to 400 PPM | ‎30-day warranty

Best Splurge

Klein tools carbon monoxide tester and detector.

It provides accurate reading and monitoring on an easy-to-read, backlit screen.

It requires a total of four batteries.

Just because the price tag is higher doesn’t necessarily mean you’re getting better protection. However if you do want something that’ll closely monitor the PPM levels in a space, then the Klein Tools CO Meter Carbon Monoxide Tester and Detector is going to be a great option. It’s built with an easy-to-read backlit screen that provides readings starting at 0 all the way to 1000 PPM. It’s also designed to be packed up and brought with you and even includes a fitted protective sleeve for travel. The only downside is that it requires a total of four AAA batteries, which is a lot more than most options on the list.

The Details: ‎‎‎‎‎1.46 x 2.16 x 7.74 inches | 4 AAA batteries | 0 to 1000 PPM | ‎30-day warranty

Best with Smoke Detection

Chtoocy 3-in-1 portable carbon monoxide detector.

This option is highly durable and aesthetically cool-looking, too.

The display screen is very bright even on the lowest setting.

The Chtoocy 3-in-1 Portable Carbon Monoxide Detector was made for folk in search of a multi-purpose safety tool to bring along for rugged adventures. It works as a carbon monoxide detector with up to 500 PPM but also functions as a smoke detector that monitors humidity and temperature as well. The durable detector comes attached to a carabiner so you can easily pop it onto a backpack or camping bag, but it also features a magnetic backing for placement on an RV or fridge. The screen is easy to read and aesthetically-pleasing but it’s worth noting that the digital display is very bright even on the lowest setting, which might be annoying if you keep it in a bedroom.

The Details: ‎‎‎‎‎‎‎‎4.21 x 3.7 x 2.56 inches | Built-in 1000 mAh rechargeable battery | 0 to 500 PPM | ‎30-day warranty

Best Plug-In

Weshlgd plug-in carbon monoxide detector.

Since no batteries are required, this option is reliable and easy to use.

The display is very bright.

If you don’t want to worry about having to track the battery levels of your carbon monoxide detector, a wall plug-in option works just as well as its battery-powered counterpart. We like the Weshlgd Plug-in Carbon Monoxide Detector in particular; the reliable carbon monoxide detector is equipped with three major air indicators (carbon monoxide, humidity, and temperature) and features a very easy to read digital LCD display that allows you to monitor air quality easily. The only thing about the digital display that isn’t great is that it’s very bright and can be disruptive in bedrooms.

The Details: ‎‎‎‎‎4.69 x 2.05 x 1.93 inches | Plug-in | 0 to 1000 PPM | ‎60-day money-back guarantee and 5-year quality warranty

Best Battery-Powered

X-sense carbon monoxide detector.

This option comes with a long-lasting lithium battery.

The display isn’t as detailed as other options.

The X-sense Carbon Monoxide Detector Alarm with Digital LCD Display is an excellent option if you’re looking for something portable and battery-powered that won’t require swapping out batteries. This option doesn’t have a flashy screen like some of the other options, but as such it’s both budget-friendly and has an impressive five-year battery life. We also really like that this option can be adhered to the wall or propped up on a table for easy reading in bed or from a desktop. Sure — the display isn’t as detailed as other options, but it’s reliable and accurate.

The Details: ‎‎‎‎‎‎0.6 x 5.3 x 2.5 inches | 5-year replaceable lithium battery | 0 to 400 PPM | ‎60-day money-back guarantee and 5-year quality warranty

Best Car Mount

Forensics car, vehicle, aircraft co detector.

It's simple to use with only one button.

The batteries need to be replaced every eight to 12 months.

This compact carbon monoxide detector is small but mighty. It may fit in the palm of your hand, but it's just as powerful and accurate as larger detectors. This device also comes with a car mount with 3M adhesive, so you can pop it on your dashboard or glove compartment for constant use. When you're on the go, you can still remove the device from the mount and stick it in your bag to use in hotels, tents, and any other overnight adventure. It also features a red light and buzzer alarm that will go off in less than 60 seconds of carbon monoxide detection.

The Details: ‎‎‎‎‎2.7 x 1.9 x 0.8 inches | 2 CR2032 Lithium batteries | Low-level alarm starts at 9 PPM and 25 PPM | 1-year limited warranty

Best with Gas Detection

Cekkiena 3-in-1 carbon monoxide detector.

It has a built-in rechargeable battery and durable construction.

The battery life could be better.

The Cekkiena 3-in-1 Carbon Monoxide Detector doesn’t stop at detecting carbon monoxide — it also monitors gas, humidity, and temperature as well. We love the easy-to-read screen and user-friendly design (especially the built-in lanyard and compact size) but the best part of this multi-purpose detector is that it features a built-in 1000 mAh rechargeable battery so you won’t have to worry about swapping out disposable batteries. The only downside is that the rechargeable battery dies pretty quickly, so you’ll have to keep an eye on the power percentage to ensure you’re alway topped up.

The Details: ‎‎‎‎‎0.67 x 2 x 3.35 inches | Built-in 1000 mAh rechargeable battery | Buzzer goes off at 50 PPM | 1-year free exchange warranty

Best Hanging

Gray rhino portable carbon monoxide detector.

This option is ultra small and easy to slip into a purse or pocket.

The display goes dark quite quickly.

Looking for something ultra compact that you can grab and go without hassle? The Gray Rhino Portable Carbon Monoxide Detector is the best hanging lanyard option we found; not only is it teeny-tiny (you could literally fit it in your pocket) but it’s also highly accurate. It’s powered by two AAA batteries but thanks to the small size and screen, the batteries will last you about 5–10 days of constant use. It’s also easy to bring this one through airport security thanks to the small and discrete size and shape.

The Details: ‎‎‎‎‎5.3 x 1.3 x 0.6 inches | AAA batteries | 50 PPM (flashing light) to 200 PPM (buzzer) | 30-day warranty

Tips for Buying a Carbon Monoxide Detector

Choose your power source.

If you're traveling internationally and want to take a plug-in detector with you, just make sure you also have an extra adapter that’s compatible with the outlets in that specific country. In those situations, you can also opt for a battery-powered device (which will also work well if you're staying somewhere off the grid, like a remote cabin). Generally speaking, battery-powered carbon monoxide detectors are easier to travel with, but they can be more expensive than plug-in models.

Prioritize portability

Since you'll be taking this carbon monoxide detector with you on your travels, portability is an important factor to consider. Just keep in mind that smaller devices often are more expensive, as the technology needs to be scaled down to fit in a more compact package.

Look for additional features

Carbon monoxide detectors range from the super basic, which will simply sound an alarm when it detects an unsafe level of carbon monoxide, to more high-tech, which might have digital displays to communicate the exact levels of carbon monoxide, and an app that alerts you when you're away. You might also want a carbon monoxide detector that detects other possible hazards like smoke or gas as well.

“Carbon monoxide (CO) alarms monitor the concentration levels of carbon monoxide in a designated space. This is measured in ppm (parts per million) and when CO concentration levels reach a certain level, your alarm will alert you,” explains Isis Wu, President, Home Safety and Marketing and Commercial Officer, Fire and Security at Carrier. “Per UL 2034 requirements, the carbon monoxide sensor will not alarm to levels below 30 ppm and will alarm in specific increments based on carbon monoxide concentration and time exposed.”

If you’re traveling with a carbon monoxide detector, the most important spot to place your device should be where you’re sleeping. It’s important to ensure the space you’re sleeping in is free of any CO in the air, but it also ensures you’ll wake up if the alarm does sound off during the night.

The symptoms of carbon monoxide poisoning include headache, dizziness, weakness, nausea and vomiting, shortness of breath, and even chest pain and loss of consciousness. Loss of consciousness (and even death) can occur within two hours of consistent exposure, so it’s extremely important to pay attention to your carbon monoxide detector if it does start to sound off.

“There’s no time to waste when it comes to carbon monoxide and under no circumstances can an alarm be ignored,” says Wu. “If you’re staying at a hotel, leave your room immediately and alert the hotel to have your room checked. If you’re staying at a home rental, go outside and call 911 to have the proper authorities check the problem. If you cannot get outside, open the doors and windows, and turn off all possible sources of CO.”

“Carbon monoxide is dubbed the ‘silent killer’ for a reason — you cannot see it, taste it or smell it. So an alarm is the only safe way to detect CO,” says Wu. It’s important to know which states require CO detectors when traveling so you can properly protect yourself. In fact, only 14 states mandate CO detectors in hotel rooms according to the National Conference of State Legislatures . Packing a plug-in CO alarm is a great solution for travelers to take their safety into their own hands.

Keep in mind that you can still ask if your hotel or rental unit has a carbon monoxide detector already. The Airbnb Home Safety program, for example, connects Airbnb hosts with distributors of combination smoke and carbon monoxide alarms for free — so a lot of Airbnb properties will already have one installed. It might still be worth bringing your own, as it’s the only sure way to know that you have a working detector in the room with you.

Yes — you’re allowed to take a carbon monoxide detector on the plane. It’s permitted in both your carry-on and checked baggage. If you plan to put your detector in your checked luggage, be sure to double check the type of battery it takes; some lithium batteries are not permitted in checked luggage due to the risk of fire.

Why Trust Travel + Leisure

For this article, Kaitlyn McInnis used her experience as a travel writer and former lifestyle editor to curate the best options to suit most needs. She also interviewed Isis Wu , President, Home Safety and Marketing and Commercial Officer, Fire and Security at Carrier. Travel + Leisure contributor Stefanie Waldek also spoke to John D'Alessandro , association secretary at the Firefighters Association of the State of New York (FASNY) for additional guidance.

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Related Articles

Best portable carbon monoxide detectors to pack for your next trip

In a dream world, travel should be fun, safe and hassle-free, but we know that's not always the case. While flight delays, bad weather and overbooked hotels can always put a damper on a vacation, it's best to be prepared for the worst and to know how to mitigate any potential risks associated with travel.

One way to do that is by traveling with a portable carbon monoxide detector to ensure your accommodations are safe and habitable. For some, that might sound extreme, but in recent years there have been a number of incidents at hotels and home shares in popular vacation destinations related to carbon monoxide poisoning — including one earlier this year at a luxury Hyatt resort in Mexico that resulted in two fatalities. That is reason enough to leave one of these handy, compact devices in your suitcase.

Related: Top 7 things to pack for your next Airbnb stay

At home, we sleep safely knowing carbon monoxide detectors are working in the background to keep us safe. Why not get that same reassurance while staying somewhere you can't guarantee is safe? Especially considering that carbon monoxide is nearly impossible to detect without assistance from a detector.

According to the U.S. Centers for Disease Control and Prevention , "carbon monoxide, or 'CO,' is an odorless, colorless gas" that can kill people and is found in the fumes produced from furnaces, gas ranges, grills, stoves, fireplaces, lanterns, engines and fuel burned in vehicles. It affects people of all ages, but certain groups — including infants, elderly people, those with breathing problems and those with heart disease — are more at risk of getting sick.

Considering the invisible nature of carbon monoxide, the best form of defense against CO poisoning is a carbon monoxide detector. You can also look out for symptoms that are associated with poisoning. The CDC says that common symptoms of carbon monoxide poisoning include:

• Upset stomach

The CDC also notes that "people who are sleeping or drunk can die from CO poisoning before they have symptoms."

Andrea Rotondo , travel expert and TPG's director of content operations, explained why she brings a CO detector when she travels:

Not all destinations have the same robust building codes or safety measures that we enjoy here in the U.S. I try to be hyperaware of my surroundings and potential safety issues. When I heard about several tragedies involving carbon monoxide deaths in hotels and vacation rentals in the Caribbean and Mexico, I knew I needed my own plan to keep my family safe. Now, on every trip, I carry a lightweight, portable carbon monoxide detector. It's small enough that there's always room for it in my carry-on, so no reason not to bring it along for peace of mind.

With all of that in mind, you can feel comfortable and safe by ordering one of the best carbon monoxide detectors for travel to pack for your next trip.

Best portable carbon monoxide detectors

Kidde portable carbon monoxide detector.

Running on two AA batteries and small enough to slide into your favorite suitcase, this simple Kidde carbon monoxide detector is affordable, weighs only half a pound, can easily sit on any tabletop at a hotel or Airbnb, and has thousands of five-star reviews on Amazon. If the device detects carbon monoxide, an 85-decibel alarm will sound and a red LED indicator will light up, providing both audible and visual cues that something isn't right.

"It's super lightweight," TPG's director of content Nick Ewen said. "Since the batteries can be popped out and put back in, there's no need to worry about it going off in a suitcase if the test button is accidentally pushed."

First Alert CO710 Carbon Monoxide Detector

With a built-in 10-year battery, this First Alert carbon monoxide detector is a no-hassle option that can live in your suitcase for years without the fear of having to recharge it or replace batteries. It features an LED screen that indicates both the temperature and CO level, as well as peak CO levels. If carbon monoxide levels are dangerously high, the machine will alert people with an 85-decibel alarm. And when that 10-year battery starts to die, a chirping noise will indicate that it's time to replace the system.

Gzair Travel Carbon Monoxide Detector

One easy way to make sure you never forget a portable carbon monoxide detector is by purchasing one that can easily clip onto your bag like a keychain. Luckily, this one made by Gzair has an attached lanyard. This handy device comes with a pre-installed battery that doesn't need to be changed for two years and a backlit screen that shows real-time CO levels. To alert travelers of unsafe conditions, it emits a 90-decibel alarm, a flashing red alert signal and vibrations.

Cekkiena 3-in-1 Portable Carbon Monoxide Detector

Another solid option with a lanyard for maximum portability, this orange carbon monoxide detector by Cekkiena measures CO levels in real time, as well as temperature and humidity levels. Instead of having to replace the batteries with this device, the 50-hour battery is rechargeable with an included USB-C cord — just don't forget to make sure it's juiced up before traveling. In the event that carbon monoxide levels get dangerously high, the device issues audible alerts to notify users of potential danger.

Best Portable Carbon Monoxide Detector to Keep You Safe During Travel

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You’ve heard stories about people suffering the ill effects of carbon monoxide poisoning while on vacation. The only way to stay safe is to be prepared. Our readers share the best portable carbon monoxide detector to take with you so you can relax and enjoy your trip without worry!

Best Travel Carbon Monoxide Detector

Written By: Michelle Nati

Table Of Contents

You may not have thought of bringing a travel carbon monoxide detector with you on a trip, but if you’ve seen the news, it may be something you’re now considering taking with you. Carbon monoxide is a colorless, odorless, tasteless gas that is created through burning wood, charcoal, propane, or any other fuel. It can accumulate to dangerous and often fatal levels when a home or car is improperly ventilated. 

Not everywhere you stay will have their own carbon monoxide or smoke detector, but you can carry one with you. A portable unit is fairly inexpensive, easy to pack, and can save your life. When it comes to carbon monoxide, it’s better to be safe than sorry. Our readers offer a helping hand by sharing reliable brands that can give you peace of mind.

Portable Carbon Monoxide Detector Reviews by Readers

First Alert CO605 Alarm

Best Travel Gas Detector: First Alert CO605

When powered, the First Alert CO605 monitor’s red light consistently glows but blinks when your battery gets low. It can be placed just about anywhere and will beep when it senses unacceptable levels of CO. One reader says, “We took one on our last trip to Ireland . It fits perfectly in the bottom of my suitcase between the handles.”

Find out which  reading device  is best for you!

X-Sense Smoke and Carbon Monoxide Detector

Best Travel Carbon Monoxide Alarm: X-Sense

This battery-operated detector by X-Sense will set off a loud, repeated beep when the room begins to fill with high levels of gas or smoke. With a built-in lithium battery; provides continuous monitoring of smoke and CO levels, even if there’s a power failure; an end-of-life signal will let you know when it’s time to replace the unit for safety. The unit has an easy to read LCD display that tells you the level of CO in the air. One reader who swears by this product says simply, “I travel with this one.”

Check out more great travel gadgets  for your next trip!

Kidde Carbon Monoxide Alarm

Best Portable Mini Carbon Monoxide Detector: Kidde

Pros who fix gas furnaces often suggest the Kidde as their go-to carbon monoxide detector because they say it’s the most accurate on the market and has a reputation for being reliable. It’s easy to set up, has a loud (but not annoying) alarm, and a bright LED display. One reader tells us she’s sold, saying, “I am buying this one for my next trip to Italy .”

Stay connected with these  travel electronics !

Alert Pro Carbon Monoxide Alarm Detector

Best Personal Carbon Monoxide Detector: Alert Pro

This Alert Pro detector has a light on its face that blinks every so often to let you know that it’s powered and doing the job it’s supposed to do. It also has a large, easy to read LCD display that lets you know levels of carbon monoxide wherever you are. 

One reader rates this detector among her favorite travel accessories. She says, “It’s small and lightweight, and gives me peace of mind. I’m glad I’m not the only one who is afraid of carbon monoxide poisoning.”

Bring one of these  mirrorless cameras to capture memorable moments!

Lunarlipes Portable CO Detector

Best Handheld CO Detector: Lunarlipes

This handheld carbon monoxide monitoring device by Lunarlipes offers great comfort in a small package. Handheld and packing a powerful alarm to warn you of dangerous carbon levels, it’s battery operated, and is compact enough to pack in your carry-on!

Use this  electronic trip checklist for your next trip!

Forensics Travel CO DETECTOR

Best Travel CO2 Detector: Forensics

“Small and handy” is how one reader describes this carbon monoxide detector by Forensics , which looks more like a computer accessory than it does a monitor. It’s higher priced but has multiple alarms for various exposure levels, a one-year warranty, and is very packable, It gets the job done for the traveler who enters unknown, indoor spaces with questionable ventilation.

Take a look at  this post  on how to block out snoring noise!

Portable Carbon Monoxide Detector Comparison Chart

Should carbon monoxide detectors be placed high or low.

Carbon monoxide is lighter than oxygen, so greater concentrations of it will be higher. Therefore, detectors are most effective when they are placed higher in a room. The best thing to do with your detector while on vacation is to place high, like next to your bed.

Does Carbon Monoxide Make You Sleepy?

It can. As a matter of fact, sleepiness is one of the symptoms of carbon monoxide poisoning. Headaches, nausea, and fatigue are also symptoms and sometimes can be mistaken for flu-like illnesses. Remember, carbon monoxide is odorless, colorless, and tasteless, so if there is too much of the gas circulating, you may not know it without the assistance of a detector. 

Overexposure to high levels of carbon monoxide can cause brain damage or even death. If you believe you’ve been exposed, move to a source of fresh air immediately.

NEWVANGA International Universal Travel Adapter

How to Power a Small Carbon Monoxide Detector

Most travel carbon monoxide detectors will be battery operated, but you might choose one that plugs into an outlet. For a trip overseas, you’ll need to bring a travel adapter , and in some cases a converter to account for different voltages, dependant on all the electronics you end up packing.

Determine whether you need a travel adapter or a converter in this video !

In order to understand the difference between an adaptor and converter, watch the video above to learn more. A simple way to remember it is, an adapter fits the outlets and a converter changes the electrical current so your electronics don’t blow a fuse!

Compass Rose Packing Cubes

Packing a Carbon Monoxide Detector

Who says packing cubes are limited to clothing? Many of our readers use them to pack much of what they bring on their trips, as they allow you to organize by number and color, so you know what’s in each bag.

Not only do these handy cubes allow you to keep your things organized and compact, but they can also be used to store electronics and other necessary accessories such as travel carbon monoxide detectors and batteries! Padding such items with clothing and slipping them into a packing cube ensures nothing gets rattled during your journey.

We put together a five-part YouTube series showing the different methods to use packing cubes for travel. If you use this specific packing strategy, packing cubes can also compress your belongings. This is the secret to traveling carry-on only!

What’s your favorite portable carbon monoxide detector? Share and comment below!

For more ideas on travel gadgets, please read:

• What are the Best Noise Canceling Headphones for travel?
• Best Portable Power Bank Chargers for Travel
• Stop Tangled Electronic Cables with these Travel Cord Organizer Options
• Best Travel Kettle Will Help You Start Your Day Right

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This was an eye-opener for me. I had not considered it…but I will look into one of these devises.. Especially when we’re traveling in the winter. Or is less developed countries – though I knew a couple here in our town who died of it. so it’s not limited to what I would consider high-risk areas.

One of the things that I looked for was removable batteries. The last thing I wanted was an alarm going off mid air due to a faulty battery. I purchased the Kidde brand

Never thought about this, but have been seeing this topic come up quite a bit in recent years.

Thanks for the breakdown. It’s really helpful.

I would assume the X-Sense detector or any other with an integrated battery shouldn’t go in checked luggage, but should be in your personal carry on.

I believe this is very important and I have ordered one.

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How To Safely Travel With A Carbon Monoxide Detector

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Traveling can be a great way to explore new places, experience different cultures, and create lasting memories. However, it’s important to understand how to safely travel with a carbon monoxide detector when on the road. One potential hazard that travelers should be aware of is carbon monoxide poisoning.

Carbon monoxide is a colorless, odorless gas that can be deadly if inhaled in high concentrations. It’s produced by fuel-burning appliances such as gas stoves, furnaces, and water heaters and can build up in enclosed spaces like hotel rooms, vacation rentals, and even cars.

Bringing a carbon monoxide detector with you is essential to protect yourself and your loved ones from carbon monoxide poisoning while traveling. 

A carbon monoxide detector is a device that measures the concentration of carbon monoxide in the air and sounds an alarm if levels become dangerous. 

With a carbon monoxide detector, you can have peace of mind knowing that you’ll be alerted if there’s a carbon monoxide leak in your accommodation or vehicle.

Key Takeaways:

• Carbon monoxide is a colorless, odorless gas that can be deadly if inhaled in high concentrations.
• Bringing a carbon monoxide detector with you while traveling can help protect you from carbon monoxide poisoning.
• Choosing the right carbon monoxide detector for your travel needs is as important as knowing how to use it properly.

Table of Contents

Understanding carbon monoxide and its dangers.

Carbon monoxide (CO) is a colorless, odorless, and poisonous gas that the incomplete burning of fuels such as wood, charcoal, gasoline, propane, and natural gas can produce. It is a serious health hazard that can cause illness, brain damage, and even death.

Carbon monoxide poisoning occurs when CO gas builds up in the bloodstream, replacing oxygen and preventing it from reaching vital organs such as the heart and brain. The symptoms of carbon monoxide poisoning can be similar to those of other illnesses, such as the flu, making it difficult to diagnose.

Some common symptoms of carbon monoxide poisoning include headaches, dizziness, nausea, vomiting, confusion, chest pain, and weakness. In severe cases, it can cause loss of consciousness, coma, and death. The risk of developing symptoms increases as the level of CO in the air increases.

It is important to note that everyone is at risk of carbon monoxide poisoning, but some people are more susceptible than others. Infants, the elderly, and those with heart or lung disease are at higher risk of developing symptoms of carbon monoxide poisoning.

To protect yourself and your loved ones from the dangers of carbon monoxide, it is important to have a working carbon monoxide detector in your home and when traveling. 

A portable carbon monoxide detector can alert you to CO gas in your hotel room or rental unit, allowing you to protect yourself and your family immediately.

Carbon monoxide is a poisonous gas that can cause serious health problems and even death. Understanding the symptoms of carbon monoxide poisoning and protecting yourself and your family from this dangerous gas at home and when traveling is important.

The Importance of a Carbon Monoxide Detector

When traveling, it is important to prioritize your safety and the safety of those around you. A carbon monoxide detector is an essential device that can help ensure your safety. 

Carbon monoxide is a colorless, odorless gas that can be lethal if inhaled in high concentrations. A working carbon monoxide detector can alert you and your travel companions to the presence of this gas, giving you time to evacuate the area and seek medical attention if necessary.

First Alert , a leading manufacturer of carbon monoxide detectors, recommends packing a portable carbon monoxide detector when traveling. 

First Alert CO400 Carbon Monoxide (CO) Detector.

These detectors are easy to transport and can be used in various settings, including hotel rooms, Airbnb rentals, and campsites. Some models even come equipped with a built-in alarm to alert you to dangerous levels of carbon monoxide.

It is important to note that not all carbon monoxide detectors are created equal. When purchasing a carbon monoxide detector, look for one tested and certified by a reputable organization, such as Underwriters Laboratories (UL) . 

Additionally, make sure to test your carbon monoxide detector regularly to ensure that it is working properly. First Alert recommends testing your detector once a month and replacing the batteries at least once a year.

In summary, a carbon monoxide detector is essential for safety while traveling . Packaging a portable carbon monoxide detector and testing it regularly can help protect yourself and your travel companions from the dangers of carbon monoxide poisoning.

Choosing the Right Carbon Monoxide Detector for Travel

When choosing the right carbon monoxide detector for travel, there are a few key factors to consider. Here are some important things to keep in mind:

Portability

Portability is one of the most important factors when choosing a carbon monoxide detector for travel. 

You’ll want to choose a small and lightweight detector to pack in your luggage without wasting too much space or adding too much weight. Look for a portable carbon monoxide detector that is specifically designed for travel.

Battery-Operated

Another important factor to consider is whether the carbon monoxide detector is battery-operated. This is important because you can only sometimes access an electrical outlet when traveling. Look for a detector that uses standard batteries that are easy to replace, such as AA or AAA batteries.

Digital Display

A digital display can be a useful feature to look for in a carbon monoxide detector for travel. This will allow you to see the current carbon monoxide levels in the room easily so you can take action if necessary. Some detectors also include an audible alarm to alert you if the levels become dangerous.

Recommended Product

One highly recommended travel carbon monoxide detector is the First Alert CO710 Carbon Monoxide Detector , available on Amazon. This small and lightweight detector makes it easy to pack in your luggage. 

It is also battery-operated and features a digital display to show current carbon monoxide levels. It has a loud alarm to alert you if levels become dangerous.

When choosing a carbon monoxide detector for travel, look for one that is portable, battery-operated, and has a digital display. The First Alert CO710 Carbon Monoxide Detector is an excellent option to consider.

• Keep your family safe with this easy to use digital-display, 10-year battery operated carbon monoxide alarm; Battery powered alarms provide continuous monitoring of CO levels, even if there’s a power failure
• Easy-to-read backlit digital display shows temperature and CO concentration; Peak Level feature displays the highest concentration of carbon monoxide measured
• Built-in 10-year lithium battery offers continuous protection for the life of the carbon monoxide detector

Last update on 2024-05-05 at 02:31 / Affiliate links / Images from Amazon Product Advertising API

How to Use a Carbon Monoxide Detector When Traveling

Traveling with a carbon monoxide (CO) detector is a smart way to help protect yourself and your loved ones from the dangers of carbon monoxide poisoning. Here are some tips on how to use a carbon monoxide detector when traveling:

1. Choose the Right Type of Detector

When choosing a CO detector for travel, look for a portable, battery-operated, or plug-in model that is easy to pack and use. Portable detectors are especially useful when traveling abroad, as they can be used in different accommodations. 

Ensure the detector has a UL 2034 mark on its packaging, verifying it meets the safety standard for carbon monoxide alarms.

2. Place the Detector in the Right Location

Place the detector in a central location where you will sleep or spend the most time. Place the detector on a nightstand or dresser near the bed if you stay in a hotel room. If you stay in a vacation home or rental unit, place the detector in the main living area or the bedrooms.

3. Test the Detector

Before using the detector, test it to ensure it functions properly. Follow the manufacturer’s instructions for testing the detector, which typically involves pressing or holding down a test button. 

If the detector does not sound an alarm during the test, replace the batteries or contact the manufacturer for assistance.

4. Know the Symptoms of Carbon Monoxide Poisoning

Even with a CO detector, knowing the symptoms of carbon monoxide poisoning is important. These include headache, dizziness, weakness, nausea, vomiting, chest pain, and confusion.

If you or someone else experiences these symptoms, move to fresh air immediately and seek medical attention.

5. Follow Safety Precautions

To further reduce the risk of carbon monoxide poisoning when traveling, follow these safety precautions:

• Never use fuel-burning devices like portable gas stoves or charcoal grills inside a hotel or vacation home.
• Ensure all fuel-burning appliances, such as gas stoves and water heaters, are properly vented and maintained.
• Do not run your car engine or generator in enclosed spaces like a garage or tent.
• If you need clarification about the safety of a particular accommodation, ask the hotel or rental property owner if they have a CO detector installed.

These tips can help ensure a safe and healthy travel experience for you and your loved ones.

Safety Measures to Prevent Carbon Monoxide Poisoning

When traveling, taking precautions to prevent carbon monoxide poisoning is important. Here are some safety measures you can take:

• Install a Carbon Monoxide Detector : Pack a portable battery-operated or battery backup carbon monoxide detector in your luggage. This will help you detect any dangerous levels of carbon monoxide in your hotel room, Airbnb, or camping site.
• Service Heating Systems and Appliances : Have your heating system, water heater, and any other gas, oil, or coal-burning appliances serviced by a qualified technician every year. This will ensure that they are functioning properly and not emitting dangerous levels of carbon monoxide.
• Ventilate Enclosed Spaces : Never leave a motor running in a vehicle parked in an enclosed or partially enclosed space, such as a garage. Additionally, never run a motor vehicle, generator, pressure washer, or gasoline-powered engine less than 20 feet from an open window, door, or vent where exhaust can vent into an enclosed area.
• Use Charcoal Grills Outdoors : When using a charcoal grill, only use it outdoors in a well-ventilated area. Never use a charcoal grill indoors or in an enclosed space, as this can lead to dangerous levels of carbon monoxide.
• Avoid Fossil Fuels Indoors : Avoid using fossil fuel-burning appliances indoors, such as gas stoves or ovens, as these can also emit dangerous levels of carbon monoxide. If you need to use these appliances, open a window or door to ventilate the area.

Following these safety measures can help prevent carbon monoxide poisoning while traveling. Always prioritize your safety and take the necessary precautions to protect yourself and your loved ones.

How To Travel With Carbon Monoxide Detectors in Different Accommodations

You must ensure safety by bringing a portable carbon monoxide detector when traveling. Different accommodations have different risks, and knowing how to use your detector correctly in each situation is important.

Hotels usually have carbon monoxide detectors installed, but it’s always better to be safe than sorry. Please bring your portable detector and place it on a nightstand or table near the bed when staying in a hotel. Make sure to keep it away from any windows or doors.

If traveling with a group, consider bringing multiple detectors and placing them in different rooms. If you notice any alarms going off, evacuate the room immediately and notify the hotel staff.

Airbnb and Vacation Rentals

Airbnb and vacation rentals may not have carbon monoxide detectors installed, so bringing your own is crucial. Place your detector in a central location, such as the living room or kitchen, where it can detect any potential leaks.

Before booking an Airbnb or vacation rental, ask the host if they have a carbon monoxide detector installed. Suppose they don’t consider finding a different accommodation.

Motels are similar to hotels because they usually have installed carbon monoxide detectors. However, it’s always better to bring your detector and place it in a central location in the room.

If you notice any alarms going off, evacuate the room immediately and notify the motel staff.

When camping, bringing a portable carbon monoxide detector with you is essential. Carbon monoxide can be produced by camping stoves, generators, and heaters, so it’s crucial to be aware of the risks.

Place your detector in a central location in your tent or RV, and keep it away from open flames. If you notice any alarms going off, turn off any potential sources of carbon monoxide and evacuate the area.

Overall, traveling with a carbon monoxide detector is a simple and effective way to ensure your safety while on the road. By following these tips, you can stay safe and enjoy your travels with peace of mind.

Traveling with Carbon Monoxide Detectors in Different Countries

Knowing the local laws and regulations regarding carbon monoxide detectors is important when traveling to different countries. While some countries may require them in certain accommodations, others may not have any regulations in place. 

Here is what you need to know about traveling with a carbon monoxide detector in different countries:

United States

In the United States, carbon monoxide detectors are required in all residential buildings, including hotels and vacation rentals. You should bring your portable carbon monoxide detector when traveling to ensure your safety. You can purchase a portable carbon monoxide detector online or at your local hardware store.

See Carbon Monoxide Detector Regulations in the USA .

Mexico has no specific laws or regulations regarding carbon monoxide detectors in accommodations. However, it is recommended that you bring your portable carbon monoxide detector when traveling to ensure your safety. 

You can purchase a portable carbon monoxide detector online or at your local hardware store.

In accommodations, the Bahamas has no specific laws or regulations regarding carbon monoxide detectors. However, it is recommended that you bring your portable carbon monoxide detector when traveling to ensure your safety. 

You can purchase a portable carbon monoxide detector online or at your local hardware store. No matter where you are traveling, it is important to be aware of the potential dangers of carbon monoxide poisoning and to take precautions to protect yourself and your loved ones. 

Bringing your portable carbon monoxide detector is a simple and effective way to ensure your safety while traveling.

Final Thoughts on Traveling Safely with a Carbon Monoxide Detector

Traveling with a carbon monoxide detector is an important safety measure that can protect you and your loved ones from dangerous levels of this odorless gas. Here are some final thoughts on traveling safely with a carbon monoxide detector:

• Always pack a portable carbon monoxide detector in your travel bag. Look for one that is compact, easy to use, and has a long battery life. Check with your airline before traveling to ensure it is safe to bring your lithium battery-powered detector on board.
• When you arrive at your destination, test the detector to ensure it works properly. Follow the manufacturer’s instructions for testing and maintenance.
• If you are staying at a hotel or resort, ask the staff if they have carbon monoxide detectors installed in the rooms. If not, consider staying at a different location with this safety feature.
• Ensure the area is well-ventilated when using appliances that burn fuel, such as stoves or fireplaces. Do not use these appliances in enclosed spaces or near open windows or doors.
• If traveling to a foreign country, research the local laws and regulations regarding carbon monoxide detectors. Some countries may require them in certain types of buildings or accommodations.
• Remember that carbon monoxide can also be present near pools, hot tubs, and other water sources. Be aware of the risks and take appropriate precautions.
• Finally, be aware of the media reports and news stories about carbon monoxide poisoning. While rare, it can happen to anyone, including Americans traveling abroad. Stay informed and take the necessary steps to protect yourself and your family.

In conclusion, traveling with a carbon monoxide detector is an easy and effective way to stay safe while on the go. By following these simple tips, you can enjoy your vacation or business trip with peace of mind, knowing you are protected from this dangerous gas.

Frequently Asked Questions

Can i bring a carbon monoxide detector on an airplane.

Yes, you can bring a carbon monoxide detector on an airplane. According to the TSA, carbon monoxide detectors are allowed in carry-on and checked bags. It is important to note that the detector must be battery-operated and not hardwired into the building.

Where is the safest place to put a carbon monoxide detector?

The safest place to put a carbon monoxide detector is near sleeping areas. This ensures that you will be alerted if carbon monoxide leaks while sleeping. A detector on each level of your home and near any fuel-burning appliances is also recommended.

Should you bring your carbon monoxide detector?

It is highly recommended to bring your carbon monoxide detector when traveling. Many hotels and vacation rentals do not have carbon monoxide detectors installed, and it is better to be safe than sorry.

Portable carbon monoxide detectors are affordable and easy to pack in your luggage.

Will a carbon monoxide detector keep beeping if it detects carbon monoxide?

A carbon monoxide detector will keep beeping if it detects carbon monoxide. The beeping is a warning that there is a dangerous level of carbon monoxide, and you should evacuate the area immediately.

What is the best travel carbon monoxide detector?

The best travel carbon monoxide detector is portable, lightweight, and has a long battery life. The First Alert CO710 Carbon Monoxide Detector is a popular choice among travelers and lasts up to 10 years.

Is a portable smoke detector and carbon monoxide detector necessary for travel?

While it is unnecessary to bring both a portable smoke detector and a carbon monoxide detector when traveling, it is recommended.

Smoke detectors are important in a fire, while carbon monoxide detectors are important in a leak. Bringing both detectors ensures that you are prepared for any emergency.

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Why I Always Travel With a Carbon Monoxide Detector

Recent traveler deaths from carbon monoxide poisoning in hotels and home rentals serve as reminders why this safety device is a packing list essential. here’s what you need to know to protect yourself..

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The carbon monoxide detector I pack on each trip retails for $30 on Amazon—a small amount for peace of mind.

Photo by Lyndsey Matthews

After arriving at JFK with plenty of time to relax at the airport lounge before our flight to Bali last November, I started to rattle off a list to my sister of things I hoped I didn’t forget at home. Passport: Obviously I had that, since we’d already made it through security. Sun hats: check. Dramamine for the ferry to the Indonesian island of Gili Trawangan: check.

“There’s one thing I didn’t have time to order, but I really wish we had,” my sister responded nervously. I already knew what she was talking about: One week earlier, three Americans had died of carbon monoxide poisoning at an Airbnb in Mexico City. I tapped my carry-on confidently and mentioned that I’d been traveling with a small plug-in carbon monoxide detector for a few months already. Our mom, worried about my frequent travel habits, mailed me one when she read about a different carbon monoxide incident at the Sandals resort on Grand Exuma Island in the Bahamas in May 2022.

More recently, on June 13, two other Americans died at Hyatt’s Rancho Pescadero resort in Baja California Sur, Mexico. Autopsies suggest they died of “intoxication by an undetermined substance,” according to the Associated Press . The hotel is currently closed for an “extensive independent investigation of the incident, led by a third party,” a Hyatt spokesperson told ABC News , and will not reopen until the investigation is complete. Even though their official cause of death has yet to be determined, I’m going to keep packing my detector if there’s a remote chance it could’ve been caused by carbon monoxide.

The “invisible killer”

“Carbon monoxide, also known as CO, is called the ‘invisible killer’ because it’s a colorless, odorless, poisonous gas,” according to the U.S. Fire Administration , an entity of the U.S. Department of Homeland Security’s Federal Emergency Management Agency. “It is undetectable to the human senses, so people may not know that they are being exposed.”

Carbon monoxide poisoning usually occurs when a fuel-burning appliance—like a furnace, gas range, water heater, or room heater—is broken or not vented properly. It can also be caused by fireplaces and portable generators, or by charcoal being burned in enclosed spaces. On average, about 170 people in the United States die each year from carbon monoxide produced by such non-automotive consumer products, according to the U.S. Consumer Product Safety Commission .

While the American Hotel and Lodging Association (AHLA) encourages its members to include CO detectors in hotel rooms and spaces with fuel-fired appliances, hotels are only required to follow applicable state and local fire, mechanical code, and CO detection requirements. Although many states require carbon monoxide detectors to be installed in private residences, not all hotels are required to have such safeguards in place, according to Kris Hauschildt, the founder of the Jenkins Foundation , a nonprofit that tracks carbon monoxide incidents in U.S. hotels and motels.

“There is unfortunately no way to tell which hotels have CO detection in place nor which ones are required to have it installed either via regulation or via individual hotel brand requirements,” Hauschildt told AFAR. Whether you’re traveling domestically or internationally, it’s best to ask hotels and rental owners directly if they have CO detectors.

According to the database kept by the Jenkins Foundation , there have been 2,505 injuries and 166 deaths from carbon monoxide incidents in U.S. hotels and motels reported in the media between 1967 and today. However, Hauschildt pointed out that a December 2021 report comparing National Fire Incident Reporting System data to media reports highlights the fact that the public only hears about a small fraction of the CO incidents occurring in U.S. hotels in the news.

“Few hotel guest rooms have fuel-fired appliances capable of producing carbon monoxide,” a spokesperson from the AHLA told AFAR. But of the reported cases, some of these were caused by boilers and heaters used to heat pools and water, gas dryers, and fireplaces. “There is no way to tell what CO sources may be present in a hotel as gas-fired appliances are usually kept out of sight in utility/maintenance rooms,” Hauschildt said. “In addition, there are also portable sources of CO that have caused harm to both guests and employees of hotels, including gas-powered tools (pressure washers, power tools), generators, and vehicles left running in underground parking garages.”

And while both Airbnb and VRBO encourage hosts to install carbon monoxide detectors in sleeping areas of their vacation homes, it is not required . (Airbnb does offer hosts free detectors, and the amenities section of each listing notes whether or not it has one.)

In July 2021, Congresswoman Angie Craig of the second district of Minnesota (which includes the southern part of the Twin Cities) introduced the Safe Stay Act to the House, which requires places of public accommodation to install compliant carbon monoxide detectors within each sleeping or dwelling unit. It was referred to the Subcommittee on Consumer Protection and Commerce but has made no movement since. Representative Craig’s team did not respond to requests for comment about if there are plans to reintroduce this bill.

Protect yourself from carbon monoxide poisoning while traveling

When booking a hotel or a vacation rental, ask whether or not the property has carbon monoxide detectors installed in its bedrooms—never assume it does. (As mentioned previously, each Airbnb listing says if it has one or not.)

To be safe, pack your own travel carbon monoxide detector. Look for plug-in models that have battery backup (and don’t forget to pack your plug adapter if you’re traveling abroad). It’s also important to make sure the detector has the UL 2034 mark on its packaging, verifying it meets the safety standard for carbon monoxide alarms in the United States.

My carbon monoxide detector doesn’t take up (too) much more space than an iPhone does in my bag.

I personally use the Kidde Carbon Monoxide Detector , which is about the size of a (very thick) iPhone, so it doesn’t take up too much space in my carry-on. It usually retails for $30 on Amazon. This one emits four beeps in quick succession when it detects CO, while others may have verbal alerts. (A smoke alarm will sound different; it might have a three-beep pattern, for example.) I leave mine plugged into the wall near where I pack my luggage each time I travel, so I never forget to throw it in at the last minute.

Airlines allow these detectors in both carry-on and checked bags, but see if you have to remove the batteries when checking your bag. ( TSA allows non-lithium dry batteries in the most common sizes like AA, AAA, etc. but restricts lithium ion and lithium metal batteries from being checked due to fire safety concerns.)

Of course, it’s also very important to know what the symptoms of carbon monoxide poisoning are, especially since they can be confused with flu symptoms. According to the U.S. Consumer Product Safety Commission , CO poisoning symptoms include, “headache, dizziness, weakness, nausea, vomiting, sleepiness, and confusion.” If you suspect you’ve been exposed, go outside immediately to get fresh air and call 911—or whatever the local emergency line is, if you’re abroad.

Best Portable Carbon Monoxide and Smoke Detector for Travel

Protect yourself and your loved ones from CO poisoning by getting the best portable carbon monoxide and smoke detector on the go. Carbon monoxide is an invisible, odorless, and deadly gas produced by any appliance that burns fuel.

The best way to detect carbon monoxide in your home, car, or RV while traveling is to install a CO detector.

Installing a CO and a smoke detector in your home or caravan is great but not really the best way. You see, as a traveler and adventurer who love traveling and camping, getting a portable digital carbon monoxide detector for camping is of greater importance.

You cannot smell or detect the presence of carbon monoxide gasses with your senses, that is because it is a colorless and odorless gas. So you can stand a risk of getting gas poisoning while traveling by not detecting it earlier.

Carbon monoxide is a colorless, odorless gas that gets into a room through the air conditioner units, vents, or unvented furnaces. In fact, it is one of the main factors that make your home dangerous.

Exposure to carbon monoxide can reduce oxygen levels, resulting in a lack of energy and tiredness because your body is not getting enough oxygen required for proper brain functioning.

A CO sensor can also help you avoid carbon monoxide poisoning and its medical complications such as blindness, memory loss, coma, and death because it will beep if there’s excess CO in your home.

Symptoms of carbon monoxide leaks in planes, school busses, trucks, and vehicles that cause poisoning CO to include headaches, nausea, dizziness, and driver fatigue.

If not detected in time, the consequences can be fatal.

Modern CO detection devices have helped reduce the number of deaths caused by carbon monoxide poisoning to a lower number.

According to the US Centers for Disease Control and Prevention,  carbon monoxide is a colorless, odorless, and poisonous gas that caused more than 430 deaths in one year.

Your safety should be your number one concern when traveling.

Given the instances of gas fumes and fire incidents in cars, busses, and planes, it is necessary to protect yourself with a carbon monoxide detector that beeps when it detects gas leaks or smoke, reducing the risk of a fire outbreak in a car or plane.

This way, you have the chance to protect yourself and your loved ones from carbon monoxide poisoning while driving and other gas emissions from fuel-powered machinery.

Best Digital Portable Carbon Monoxide Detector for Travel with Audio and Visual Display

Our loyal visitors state the best portable carbon monoxide detector for traveling in cars, trains, planes, and camping .

Best Portable Carbon Monoxide Detector for in the Car Car, Vehicle, Aircraft Carbon Monoxide CO Detector by Forensics

The best portable carbon monoxide and smoke detectors for cars are Car, Vehicle, Aircraft Carbon Monoxide CO Detector by Forensics.

With a longer battery life of 8 – 12 months, this mini CO sensor CO accurately detects exhaust fumes from your cars, planes, etc. You might mistake this device for a phone because of its portability.

With this CO detector, you can travel in your car and feel like you have everything under control. Although this device is a little expensive, it is highly recommended by WHO, EPA, ASHRAE, OSHA, NIOSH, etc., to all vehicle owners.

If you are looking for a portable carbon monoxide detector, then a car, vehicle, Aircraft Carbon Monoxide CO detector from Forensics is the best choice.

It detects carbon monoxide and smoke and other polluting gases like methane gas, sulfur dioxide, etc. This device has an indicator light that turns on when the carbon monoxide levels get too high to ensure safety.

It is effortless to install, as all you have to do is place it at the head of your car’s driver’s seat or in another area where the exhaust fumes are highest. When you buy it, you will also get a two-year warranty.

The device is straightforward to use, as all you have to do is remove the battery cover and then slide the carbon monoxide detector into place.

Best Carbon Monoxide detector for Camping: First Alert Dual-Power Carbon Monoxide Detector Alarm

So, when you are chilling on vacation and enjoying your camping experience, don’t forget to protect the lives of your loved ones from CO poisoning by getting this portable carbon monoxide detector for campers.

This device is designed for small spaces, and its compact size makes it the perfect choice when traveling. First Alert actually has three models for home and camping use.

The Breathe Easy Portable Carbon Monoxide Detector, the Personal Carbon Monoxide Alarm , and the Safe & Sound Carbon Monoxide Alarm with Hush Button for up to 9 LBS each (model number 1040).

The First Alert dual power carbon monoxide detectors are light enough to be easily carried on a camping trip.

In addition, it comes with two long-lasting batteries , so you don’t have to worry about running out of power on your trip or if you need to keep an eye on the nursery.

Best Handheld Digital Carbon monoxide detector: UEi Test Instruments CO71A Carbon Monoxide Detector

The best handheld carbon monoxide detector is UEi Test Instruments CO71A Carbon Monoxide Detector . It is your go-to place to get a handheld CO detector for both residential and industrial CO use.

This is the best handheld multipurpose carbon monoxide detector for the on-the-go with state-of-the-art audio and visual alarms for CO detection. But unfortunately, it has a life span of five years and is also very expensive.

This CO detector is sensitive and has a sensor that can detect CO concentrations up to 5 PPM. It is lightweight at only 8 ounces, so even long-term hand use is pretty painless.

It has a backlit digital display with a two-button operation for ease of use. The display also lets you see the time and date of the current CO detection.

A huge selling point for this product is the 10-year calibration cycle.

With this feature, you don’t have to go through the hassle of recalibrating your CO detector every year, as the 10-year calibration cycle will help you save time and money in the long run.

It is also instrumental in detecting carbon monoxide leaks, especially in appliances and gas combustion.

It has a low-profile, super slim design that you can easily put in your pocket or wear around your neck. It helps you carry it with you wherever you go without feeling the weight on your shoulders.

This could be just what you need if you’re on a long business trip and want peace of mind thanks to its long battery life (up to 40 hours) with lithium batteries.

You can choose not to put it in “sleep mode” if that saves energy, which is always good.

Frequently asked questions

Where should a carbon monoxide detector be placed.

The question of where to place your carbon monoxide detector in your car when you’re on the road has confused some people lately.

While some experts suggest placing it strategically high overhead because carbon monoxide is slightly lighter than air, others suggest placing the CO detector lower.

To clear your doubts, it doesn’t matter whether you place these digital portable carbon monoxide detectors high or low; whichever you choose, they can still effectively CO detect gasses and smoke because carbon monoxide emissions quickly mix with the air and spread in the area of the omission.

Therefore, it now has high concentrations in the air.

However, it is best to place your carbon monoxide sensor (CO) high and next to your bed while on vacation if you are camping.

Can you take a carbon monoxide detector on a plane?

Yes, you can actually take a portable carbon monoxide detector on a plane if and only if the relevant authorities approve it.

This must comply with IATA Special Provision A41 and must have been checked as baggage and certified by the airport authorities.

In addition, its mini size and sealed battery make it easy to pack in a bag of any size when traveling by car or plane.

Final thoughts…

What to look for in a carbon monoxide alarm.

When looking to buy the best portable Carbon Monoxide and Smoke Detector for travel and camping, there are two important things you should not miss.

Carbon monoxide and smoke detection

Whatever your choice, you need to get a device that can accurately detect CO with an alarm loud enough to alert you in times of danger.

You should also get a portable device with standalone 2-in-1 CO and smoke detection.

Installation and Battery Life

Mini smoke alarms do not require any special type of installation. They are plug-and-play devices.

However, since you would be camping or traveling, a battery-powered portable carbon monoxide detector is essential.

• https://en.wikipedia.org/wiki/Carbon_monoxide
• https://www.cdc.gov/co/faqs.htm
• https://www.nhs.uk/conditions/carbon-monoxide-poisoning/

Related posts:

• What is the right Carbon Monoxide Detector Mounting Height?
• Do Carbon Monoxide Detectors Expire?
• How long does a 9v battery last in smoke detector
• Smoke Alarms: Your Frequently Asked Questions Answered by a real Firefighter
• Why does my smoke alarm keep beeping 3 times?

Carbon Monoxide Travel Tips

Traveling is a time to relax, experience new things and make memories. It’s a chance to forget about your long to-do-list and be worry free! However, even while on vacation, safety should always remain on your mind. Whether you are traveling with friends and family, for business, near or far, help protect yourself and loved ones by packing a carbon monoxide (CO) detector.

Carbon monoxide is a tasteless, odorless and poisonous gas commonly produced from fuel burning devices such as a stove, fireplace or water heater. The only way to detect this deadly gas is by having a functioning carbon monoxide alarm.

When traveling, it is hard to know if where you are staying will have working carbon monoxide alarms . As well as if they will have the recommended number of alarms and follow proper placement of CO detectors for best protection. To help ensure you and your loved ones are protected, First Alert recommends packing our small, tabletop carbon monoxide detector for your travel needs.

Carbon Monoxide Detector For Traveling

This 10-year sealed battery carbon monoxide detector  is ideal for traveling:

• The tabletop design requires no installation, simply place it on any shelf or counter
• The 10-year battery eliminates the need to replace the batteries for the life of the alarm
• Its small size makes it ideal to pack in any size bag
• The sealed battery is safe to pack when traveling by plane

Next time you book a hotel room, rent a vacation home, or travel to see family and friends, make sure to follow our carbon monoxide detector travel tips and pack this life saving device in your bags. It is best to be prepared since you don’t know the last time the hotel changed the batteries in the alarms or if your vacation rental will even have carbon monoxide detectors. A portable CO detector for travel will help ensure that your vacation is worry free and that your family is protected from the dangers of this deadly gas.

For more information on traveling by plane with battery-operated devices, please visit FAA.gov for travel guidelines.

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Appliances around your home, such as fireplaces, boilers, and water heaters, can emit carbon monoxide if they don’t fully burn their fuel. Because carbon monoxide (CO) isn’t visible and doesn’t have a smell, you should install carbon monoxide detectors throughout your house to monitor the levels of this gas and improve your home safety. A carbon monoxide detector should audibly and visually alert you when it detects a dangerous environment, so you can quickly get you and your family to safety. Some carbon monoxide detectors also come with smoke detectors built-in for an all-in-one device. However, base models typically cost around $30 – 70, with dual models or portable models sometimes ranging from $70 – $150. To help you find the best CO detector for your home, the This Old House Reviews team put together this guide to the best detectors on the market. Our choice for the best overall carbon monoxide detector is the First Alert Combination Smoke and Carbon Monoxide Detector for its light indication capability. Read our guide below for more about our top picks.

Best Visual Alerts First Alert Smoke and Carbon Monoxide Detector

Best Pack Options Kidde Smoke & Carbon Monoxide Detector

Best Plug-In Kidde Nighthawk Carbon Monoxide Detector

Top 7 Carbon Monoxide Detectors

• Best Visual Alerts: First Alert Combination Smoke and Carbon Monoxide Detector
• Best Pack Options: Kidde Smoke & Carbon Monoxide Detector
• Best Plug-In Detector: Kidde Nighthawk Carbon Monoxide Detector
• Best Lifespan: X-Sense Smoke and Carbon Monoxide Detector
• Best Smart Detector: Google Nest Protect Smoke Detector and Carbon Monoxide Detector
• Best Compact: First Alert CO710 Carbon Monoxide Detector
• Best Portable: GZAIR Travel Carbon Monoxide Detector

Compare Top Carbon-Monoxide Detectors

Best visual alerts.

First Alert Combination Smoke and Carbon Monoxide Detector

Prices taken at time of publishing.

• $63 at Amazon

What Customers Are Saying

Customer reviews we found said that this detector was easy to install, had a loud alarm, and offered a lot of features. Those who were disappointed with the product said that it malfunctioned after a few months of use. “ If you sleep through this, you’re probably dead and don’t know it! The installation was easy; just the wood panel at my place held it securely. It replaced another brand that was supposed to last ten years. Well, it didn’t, and rather than upgrade through them, I passed and bought this unit. It is loud, and I am hard of hearing. I think you will be satisfied with the installation and the easy-to-replace AA batteries .” —R. Elliott via Amazon “We bought this smoke detector two years ago. It has just given off the three chirps, which indicates it is malfunctioning and needs to be replaced. The average life span of smoke detectors is 10 years, so this severely missed the mark. At least it let us know it was failing.”   — Natalie De Moss via Amazon

Best Pack Options

Kidde Smoke & Carbon Monoxide Detector

• $55 at Amazon

Customers praised this device’s low noise level, long-lasting battery life and ease of installation. We also noted that those who didn’t enjoy their purchase said that they were missing parts, and others said they had an issue with false alarms going off consistently. “They say you need to replace your smoke/CO detectors every 10 years. Our old detectors were in need of changing. We purchased these because we got a better value. These are hardwired and battery backup detectors. These also talk – if there is a fire, it will say fire, and if there is CO, it will say CO. You will know what the problem is when it goes off.” —CM Turner via Amazon “ Worked fine for a while, occasional false alarms, but was able to hush swiftly. However, I’m now trying to sell my house. As we were moving out, the alarms started sounding off for smoke and CO detection 24/7. Unable to turn them off with hush/test button, they are hardwired, so removing the battery was not an option. I had to turn off the breaker just to keep my sanity and that of the handymen working on the house. I will now have to fork out more money to get new ones .” —llbm via Amazon

Best Plug-In Detector

Kidde Nighthawk Carbon Monoxide Detector

• $35 at Amazon

Our research showed that customers who left poitive reviews for this carbon monoxide detector said that it was easy to install and provided peace of mind. However, some reviewers had difficulty utilizing the manufacturer’s limited warranty.

“A bright LED is much better than the dim LCD displays. You can read it from across the room or in the garage. The default display is the CO level, the main data you are monitoring. Unlike other brands you don’t have to find and press a button to read the CO level. So you can monitor it for a trend before the level reaches the threshold that sets off an alarm. The others have temperature as the default display. I don’t buy one of these because I want a thermometer.” —Ted via Amazon

“I purchased the unit from Amazon in December 2021. It says 10-year warranty. It was beeping this morning, readings were at zero, so I figured it was the battery. Changing the battery didn’t help, plus the old battery was tested and was still good. The unit shouldn’t be malfunctioning after a year and change. I put a unit from the living room into the bedroom, and the CO readings are fine, so it’s the unit.” —Audrey Q. via Amazon

Best Lifespan

X-Sense Smoke and Carbon Monoxide Detector

• $37.99 at Amazon

Most reviewers we found were satisfied with the detector, saying that it was well-made and a good value. A lot of customers appreciated the light indicator that was paired with the alarm. Those who were unsatisfied with their purchase said that mounting the device to a wall.

“These CO and smoke detectors are easy to install, and they really look nice compared to the 20-year-old ones we replaced them with. While testing them, there are distinct beeps for smoke and for CO. The 10-year battery is a great feature as well. I have bought enough to replace all of my old ones. —Kansas. via Amazon “Even though this unit is not wired, I would expect that many (if not most) customers will be replacing wired detectors. Not having mounting holes that line up with a standard ceiling electrical box if a very poor design. I had to drill holes into very dry wallboard, and while the units are up, I am concerned about durability over many removals and re-installs for the frequent recommended cleaning.” —Jim Rogers via Amazon

Best Smart Detector

Google Nest Protect Smoke Detector and Carbon Monoxide Detector

• $104.49 at Amazon

Several customers we found said that they loved the design, light feature, and motion detection of this device. We also noted that some of those who were unsatisfied with their purchase said that it was more difficult to install than basic devices because of the smartphone setup.

“I got this for the area where my child’s room is. With transitioning them to their own area, this gives me comfort way more than the normal detectors. I love that I can check status whenever and set up was very easy. Worth it!” — Ben via Amazon

“Installation was a nightmare. It turns out the install program crashes constantly on iOS. The only thing you can do is delete all Nest messages inside the app (seriously) and then it will only crash one in five times as opposed to 19 in 20 times. One installed detector refused to add itself to the network. It got fixed with the help of excellent user support, but it was a wasted hour.” — ITM via Amazon

Best Compact

First Alert CO710 Carbon Monoxide Detector

• $36.81 at Amazon

We noted that customers who gave this product positive reviews liked that it had easy installation, and was perfect for small spaces. Several others liked that it had a 10-year battery. However, some reviewers did feel that the display was not large enough, and others found it difficult to display PPM numbers. 

“Easy install. Nice appearance, reasonable size and even displays temperature.” —J. Samuelson via Amazon

“If you push the button a few times, you can access the memory, but it does actively display parts PPM. only temperature. This feature is the main reason I purchased this one. The info leads to this being a setting, but the instructions only cover checking the memory.” —Mathew Habicht via Amazon

Best Portable

GZAIR Travel Carbon Monoxide Detector

• $116 at Amazon

Our research showed that several reviewers who liked this carbon monoxide detector were impressed with its easy portability and straightforward setup. Others were impressed with its vibration alert system when CO was detected. However, there were some reviewers who felt that swapping the battery was challenging and that it didn’t always reset properly after sensing exposure. 

“This is a great device that is good for travel. My wife hears horror stories of people dying in resorts from carbon monoxide poisoning, so you bet we have to travel with one of these things. The buttons and controls are simple, and easy to use. It is not easy to accidentally turn on in a bag of luggage. The waterproof and durable features are great!” — Jake & Kait via Amazon

“ Also, after my test readings the unit failed to completely reset to 0 (It also has a peak value memory, that was fine). It sat around 16 on the first time and 10 on the second test. This was even though I was in known clean air. To get it back to 0 I had to turn it off and on again and let it go through it’s calibration cycle. But the important part was that it did register and alarm.” — DoverNH via Amazon

What Are the Biggest Factors When Buying a Carbon Monoxide Detector?

Not every carbon monoxide detector is the same, and the best model for your home will depend on what features are most important to you. Some things you should keep an eye on are the power source of the device, its functionality, alert volume and display, and interconnectivity. Read our buying guide below for more information about carbon monoxide detectors.

Power Source

Carbon monoxide detectors are either battery-operated, plug-in, or hardwired.

• Battery: These detectors work even if your power goes out because they run on standard AA batteries or AAA batteries. However, the batteries only last about a year before they need to be replaced. The device will usually chirp to tell you when you have low battery. Occasionally, battery-operated detectors will use lithium batteries, which don’t need to be changed since they last for the entire lifespan of the detector.
• Plug-in: Plug-in models plug into an outlet. They usually come with a battery backup to continue working during a power outage.
• Hardwired: This type of detector is hardwired to your home’s circuitry. Similar to plug-in models, hardwired carbon monoxide models don’t work during power outages unless they have a battery backup.

Most smoke alarms detect more than just carbon monoxide. The most common second function you’ll find in a carbon monoxide detector is smoke and fire detection , but you can also find devices that detect natural gas.

Some detectors have a digital display that allows you to determine if there’s any carbon monoxide in your home, even if it’s a small amount that won’t hurt you. If your carbon monoxide detector doesn’t have a digital display, it’ll likely beep when the level of carbon monoxide in the air reaches a dangerous level.

Alert Volume

The CO detector should be loud enough to wake you up and to be heard from every part of the home, particularly in sleeping areas whenever there is a detection of CO poisoning. Most detectors have a CO alarm that’s at least 85 decibels. However, the alarm will be quieter from across the home, which is why it’s important to have more than one installed. Some alarms also include voice alerts notifications that describe what the specific alarm is.

Interconnectivity

As previously mentioned, you’ll need to install several carbon monoxide detectors in your home if it’s relatively large. This will help you hear the alarm from anywhere in your home and ensure that you’re getting accurate carbon monoxide readings throughout your home. If you purchase several of the same model, you’ll be able to connect the devices to ensure that if one detects carbon monoxide, all of them will beep to alert you.

The sensors in your detector will typically wear out after five to 10 years. Consider replacing your device around this timeframe.

What Could Cause a Carbon Monoxide Leak?

There are numerous things in and around your home that could lead to a carbon monoxide leak, making it even more essential to stay well-equipped with a high-quality, working carbon monoxide detector. Here are some of the biggest reasons why a carbon monoxide leak could occur.

• Faulty or poorly maintained appliances : Gas-powered furnaces, water heaters, stoves, ovens, fireplaces, and other fuel-burning appliances can release carbon monoxide if they are malfunctioning or not properly maintained. The most frequent cause is due to issues with ventilation, burner problems, or blocked exhaust flues.
• Inadequate ventilation : Proper ventilation is crucial for removing combustion byproducts, including carbon monoxide, from indoor spaces. If a home’s ventilation system is not functioning correctly or if there are obstructions in vents, CO can build up indoors.
• Cracked or damaged heat exchangers : In gas furnaces, heat exchangers are designed to separate combustion gases from the heated air circulated through the home. If the heat exchanger is cracked or damaged, it can allow carbon monoxide to mix with the indoor air.
• Blocked chimneys or flues : Chimneys and flues are responsible for venting exhaust gases safely to the outside of your home. If they become blocked or clogged with debris, it can cause a backdraft, allowing carbon monoxide to enter the living spaces.
• Using outdoor equipment inside : Using generators, grills, or other gasoline-powered equipment indoors or in enclosed spaces can produce high levels of CO. These items should always be used outdoors in well-ventilated areas.
• Vehicle exhaust in attached garages : When a vehicle is left running in an attached garage, carbon monoxide can seep into the living areas of the house. It is essential to open the garage door before starting the car and to avoid running vehicles inside the garage.

Frequently Asked Questions About Carbon Monoxide Detectors

Who is at risk of carbon monoxide poisoning.

If you have a carbon monoxide leak in your home, infants, young children, the elderly, and people with chronic heart disease, anemia, or respiratory problems are at a higher risk of carbon monoxide poisoning.

What are the symptoms of carbon monoxide poisoning?

Symptoms of carbon monoxide poisoning look similar to those of the flu. You may experience the following if you’re exposed to high CO levels.

• Upset stomach
• Confusion/disorientation

Am I supposed to test my carbon monoxide detector?

Yes. You should test your detector at least once a month. Most models will have a button on them that you can press. When you press that button, the device should sound the same alarm that would go off if carbon monoxide is detected.

Where should I put my carbon monoxide detectors?

You should have a carbon monoxide detector on every floor of your home and 15 – 20 feet from your furnace or another fuel-burning heat source. If you want more protection, you can place a carbon monoxide detector outside of every bedroom.

Why Trust The This Old House Reviews Team

This Old House has empowered homeowners for more than four decades with top-notch home improvement content in the form of television programs, print media, and digital content on its website and social media platforms. The This Old House Reviews Team focuses on creating in-depth product and service review content to help inform your purchasing decision for just about any item or resource that you might need for your home. The This Old House Reviews Team has written over 1,000 reviews on products in the home space, from cordless drills to kitchen trash cans, lawn mowers, and dining room decorations.

We recommend products in each review using an intensive research process, spending hours combing through the best available models on Amazon. For a product to make our list of top picks, it must hold a solid sales record on Amazon, have consistently positive customer reviews, and offer unique features, among other factors. After narrowing down our list of recommendations, we conduct additional research and sometimes in-person testing to ensure that the products meet our standards. Once we conclude the research phase, we craft a well-rounded, user-friendly article that includes our recommended products and additional information to help homeowners like you make the right purchase.

To share feedback or ask a question about this article, send a note to our Reviews Team at [email protected] .

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Best Portable Smoke Detectors for Travel

Whether you need one for your caravan or your hotel stay, having a small, portable smoke alarm can be a lifesaver. We review five of the top rated ones.

Smoke detectors are gadgets that can detect smoke in their surroundings. These tools come in various shapes, sizes, and features. You’ll find smoke detectors in most, if not all workplaces of USA, as it’s mandatory to have them. Some even have specialised versions, such as detectors for the deaf .

Other than that, people have installed smoke detectors for their homes for quite a while.

More recently, tourists are carrying portable smoke detectors on their journeys. These devices are a lot smaller, more compact, and quite affordable.

A lot of resorts and hotels around the world don’t have any smoke detectors. This is the case in far flung destinations that might not have the regulatory bodies that we are used to in our home countries.

Imagine you’re taking a nap in your hotel room after a long, tiresome day, and fire breaks out! It’ll be too later before you realize what’s happening.

But, if you carry portable smoke alarm detectors for travel, you’ll always know in case there’s a fire. And today, we’ll talk more about these amazing gadgets and will share our top picks as well!

1. First Alert P1010

This features a photoelectric sensor, which explains its hefty price. The sensor used in this device is very effective and accurate. It will inform you in case there’s a smouldering or slow-burning fire nearby.

The sensor's optimized, and it won’t set off false alarms in case there’s kitchen smoke or any stove around. The device features a blaring 85dB alarm that’ll get your attention even if you’re standing a bit afar. The First Alert portable smoke alarm detector for travel is one of the best when it comes to looks.

The device has a great design and it has a 360-degree metal mesh that sucks in the air. Another great feature is its lithium-ion battery that lasts for ten years straight! The device features a mounting bracket that lets the user install it on walls and ceilings.

• Accurate photoelectric sensor
• An optimized sensor that doesn’t set off any false alarm
• Comes with a mounting bracket for easy installation
• Takes some time for sounding the alarm

2. Vitowell

The Vitowell photoelectric fire alarms offer great value for money. In this package, you’re getting three fire alarms at a very affordable price. The sensor is fast, in some cases, it provides faster results than an ionization sensor!

This device features batteries, which is great as it can save you from a lot of hassle when installing. The battery drawer can release with an easy slide, and you can replace it with any 9V battery. The device will warn you in case the battery is low, so all good there!

The smoke detector features an 85dB alarm and it flashes a red LED as well. We found this very convenient as this will alert you even if you have a noise-isolating headphone on.

The device is friendly and it comes with a warranty of five years! You will also get a mounting bracket with the package.

• Features a fast-photosensitive sensor
• Runs by 9V batteries
• Offers a five-year warranty
• Flashes red LED when alerting and set off an alarm of 85dB
• Budget-friendly
• Not as accurate as of the high-end products
• Can’t be plugged in

3. X-Sense Mini

If you’re looking for a two-in-one product that can be a smoke detector and is also a portable Carbon Monoxide detector , you should get this. The device features two distinct sensors and each works to provide the results. The device has a flat-circular design that makes it easy to pack.

It features an LCD that will show you real-time information. The display is backlit, so you’ll be able to see it even in the dark. There’s an indicator that’ll tell you whether it’s working or not, and there’s a red LED that’ll alert you if there’s CO or smoke.

The device has a cluster of horn holes on one side and an 85dB alarm on the other side. The design is sleek and subtle. You’ll need only two 1.5V AA batteries to run this tool.

It also has an indicator that’ll let you know if it’s time to change the batteries. Speaking of easy installation, you’ll get a mounting bracket as well. It’s an allrounder portable smoke alarm detector for travel.

• Has two built-in sensors for detecting smoke as well as Carbon Monoxide
• Runs by two 1.5V AA batteries
• Features a backlit LCD
• Has LED indicator as well as an 85dB alarm
• Can’t be plugged into any power outlet

4. JNHCD Smart

This features photoelectric sensors that set off the alarm very fast. The device is well built and as a result, it’s sturdy, environment friendly, and durable. The sensor used in this product isn’t the best available in the market, but it manages to get the job done.

The device features a red LED indicator as well as an 85dB alarm. You’ll also get a test button. The device isn’t wired.

You need batteries to run this, which makes it very portable. Yet, it also brings us to a drawback. If you don’t have spare batteries and the device runs out of charge, you’ll have to wait till you can get new ones.

You’ll get a mounting bracket with the detector. If you’re going to be staying at a hotel, you can have them mount it on the ceiling or the wall for extra convenience.

• Features accurate and fast photosensitive sensors
• Affordable pick
• Comes in a three-item package
• You’ll get a one-year guarantee and five-year warranty
• A bit too thick take up more space

5. Siterlink

Last but not the least, we have the Siterlink smoke alarms. These are the tiniest tool of this list. They are very small, which makes them very convenient for travel.

The device doesn’t need any wiring, which makes installation very easy. It’s quite surprising that the alarm is very sturdy despite its miniature size. It’s tried and tested, and it passes the UL217 safety certification, which is a big plus.

Even if you drop it many times, it won’t damage in any way! The tool features a lithium-ion battery that's expected to last for twelve years! The device's expected to run for ten years without a hitch!

This comes with photoelectric technology; thus it can detect slow-burning fires with ease. The device is circular, and the sides are with a high-quality metal net.

Gas comes in through the metal net and analyzed. If you find that the battery is low, you can turn on the non-disturb mode. This'll ensure that there’s least battery consumption, which is helpful if travelling.

• Very small in size, convenient for travel
• Features high-quality metal net
• Very sturdy, has the UL217 safety certification
• Features a lithium battery with a life expectancy of 12 years
• Easy installation
• Easy to lose

How We Decided On Our Winner

There are tons of portable smoke alarm detectors for travel. Out of many, we selected the few items that caught our attention. If you want the most accurate sensor, go for the First Alert Photoelectric Smoke Detector.

If you’re looking for the ultimate portability, then the Siterlink Smoke Alarm is the one for you. The Vitowell Combination Smoke and Carbon Monoxide Detector is the one.

And if you want to buy many devices on a budget, go for any among the other two items listed above. No matter which item, we can assure you that you’re taking one of the best portable smoke alarm detectors for travel.

FAQ and Buying Guide

Smoke Detectors:

There are industrial smoke detectors and then there are commercial smoke detectors. Industrial smoke detectors are accurate, while commercial comes with reduced precision, but portability. Today we’ll be talking about commercial smoke detectors only.

Types of Smoke Detectors According to Sensor:

Again, smoke detectors can divide into two categories according to their sensor. There are photoelectric sensors, and then there are ionization sensors.

Photoelectric sensors detect sudden scattering of light, and that’s how they signal. Yet, these aren’t that fast. They usually take fifteen to fifty minutes, that’s why they are more useful when we’re dealing with a slow fire.

Ionization sensors detect even the smallest particles and respond within sixty seconds. These come with two charged plates with a bit of radioactive material placed between.

The material ionizes the air and keeps a stable flow of electrons between the plates. Smoke particles can disrupt the flow of the ions, which in turn sets off the alarm.

The features of this type make them effective when dealing with fast-burning fires. Yet, they got a downside as well. As these are sensitive, they can be set off with kitchen smoke or even with aerosols.

Which Type Do You Need?

Each sensor comes with unique characteristics and they respond to different situations. While photoelectric detect slow-burning fires, ionization sensors detect fast-burning fires. That’s why it’s suggested to use a combination of both types of smoke detectors.

If you use this combination, you’ll be safe from both fast-burning as well as slow-burning fires. And during your travels, you never know what might happen! So it’s always best to prepare.

Smoke Detectors Cost and Maintenance:

Smoke detectors can be a very affordable price. Especially, ionization smoke detectors are very affordable. You might have to spend some more cash if you’re looking for a photoelectric sensor.

Smoke detectors can run by plugging them into any outlet, or with a replaceable battery. Even if you’re on a bus, you can keep them activated.

Smoke detectors come with a life expectancy of eight to ten years on average. They’re usually covered with a warranty, which makes buying detectors an investment!

Things to Consider Before Buying a Smoke Detector:

The sensor is the first thing you should research. Although we recommend you get different smoke detectors and have both the sensors. You can start with ionization sensors as these are more affordable.

Build Quality:

You don’t want a smoke detector that might get scratched after throwing in your backpack. So, choose a smoke detector that has a good build quality. Although you’ll find them to be plastic, try to avoid the ones with cheap plastic.

Battery or Plug-in?

The smoke detectors that we’ll talk about come with both the plugin and battery option. If you’re looking for other products, try to take the ones run by a battery. Otherwise, you may find it inconvenient when you want to activate them on a bus for an instance.

Portability:

Smoke detectors come in all sizes and shapes. The ones we will review below are perfect for travel.

If you have other products at your hand, look for the ones that can slide into your backpack with ease. Otherwise, you’ll have a hard time carrying them around.

To read more articles like this, go to our Home Alarms section .

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Best Smoke and Carbon Monoxide Detectors of 2024

Consumer Reports' lab tests reveal the best ones for protecting you and your loved ones

When you shop through retailer links on our site, we may earn affiliate commissions. 100% of the fees we collect are used to support our nonprofit mission. Learn more .

A smoke and carbon monoxide detector ’s ability to sense carbon monoxide (CO) can mean the difference between life and death. According to the Centers for Disease Control and Prevention , more than 400 Americans die from accidental CO poisoning every year, and about 100,000 end up in emergency departments. While most detectors look similar and come certified by a testing organization such as Underwriters Laboratory (UL) or Intertek Electrical Testing Labs (ETL), their efficacy isn’t necessarily the same. “We need to test detectors because some fail at CO detection, and there are differences in how quickly different models respond to CO,” says Bernie Deitrick, Consumer Reports’ test engineer for smoke and CO detectors. “I have never tested a model that failed our fire and smoke tests, and it is reassuring to know that such critical devices actually work.”

For a look at all the models we’ve tested, see our smoke and carbon monoxide detector ratings . And to figure out the right detectors for your home, read the accompanying buying guide .

In the lab, we expose detectors to both flaming fires and smoldering, smoky fires to see how well they detect fire and smoke , respectively. For interconnected CO alarms—which react as a group when any one of them is triggered—we expose them to precise low CO levels (100 parts per million, or ppm) and high CO levels (400 ppm) to see how accurately and how quickly they detect the deadly carbon monoxide. And for stand-alone CO detectors, we check the accuracy of the CO levels that they either display on their screens or read aloud via voice messages.

Generally, detectors are battery-powered, hardwired, or plugged into an outlet. To determine the type you need, remove the detectors in your home from their mounts.

• Battery-powered detectors are wireless and can be placed anywhere. They typically run on replaceable batteries (usually 9-volt or AA) or sealed lithium batteries that last 10 years.
• Hardwired detectors require special wiring for power that’s typically found only in newer or renovated homes. You’ll know you have hardwired detectors if there are wires connected to them that run into a wall or ceiling. 
• Plug-in detectors receive a constant flow of power from an outlet. Both hardwired and plug-in detectors use a backup battery that will take over in the event of a power outage. Backup batteries need to be replaced annually.

Below are the best smoke and carbon monoxide detectors from our tests, arranged in alphabetical order, with hardwired and battery-powered picks for each type of detector: stand-alone smoke detectors, stand-alone CO detectors, combination smoke-CO detectors, and smart smoke-CO detectors that can send alerts to your smartphone.

Best Hardwired Smoke Detectors

Best battery-powered smoke detectors, best hardwired carbon monoxide detector, best plug-in carbon monoxide detector, best battery-powered carbon monoxide detector, best combination smoke and carbon monoxide detectors, best smart combination detectors.

First Alert 3120B

CR’s take: The First Alert 3120B is a dual-sensor smoke detector, meaning it has both a photoelectric sensor for detecting smoky fires and an ionization sensor for detecting flames. Thanks to its use of both types of sensors, this First Alert receives top scores in our flaming fire and smoldering fire tests. It’s hardwired with a battery backup, which makes it a good candidate for newer or remodeled homes that have wiring for detectors, and it features a hush button to silence nuisance alarms. It can be interconnected with additional detectors so that if one goes off, they all go off and alert you to danger even if you’re in a different room or on a different floor from the fire.

Kidde PI2010

CR’s take: Another top performer in our tests is the Kidde PI2010 , which receives the highest scores possible in our flaming fire and smoldering fire tests. This hardwired, dual-sensor alarm features a battery backup, a hush button, and the ability to interconnect with other compatible detectors. To determine which other models are compatible with this one, check with Kidde.

First Alert SA320CN

CR’s take: The First Alert SA320CN is one of the best battery-powered dual-sensor detectors in our ratings, receiving high marks in both the flaming fire and smoldering fire tests. It features a hush button and runs on two AA batteries, but it can’t interconnect with other alarms to make them all go off in the event of a fire.

First Alert Ultimate Protection SA3210 (Battery)

CR’s take: First Alert’s Ultimate Protection SA3210 received top marks for the flaming fire and smoldering fire tests. Like the SA320CN, the SA3210 features a hush button, but instead of two AA batteries, the SA3210 runs on a 10-year lithium battery. It also can’t interconnect with other smoke detectors.

Kidde PI9010

CR’s take: Another good choice for a battery-powered detector is the Kidde PI9010 . This top-notch detector receives strong scores in our tests for flaming fires and smoldering fires. It features a hush button and runs on a single 9-volt battery, but it can’t interconnect with other detectors. (Models made between Sept. 10, 2016, and Oct. 13, 2017, are subject to a recall due to a defect that prevents them from detecting smoke. This recall doesn’t affect units currently available for purchase.)

Universal Security Instruments AMIB3051SC

CR’s take: The Universal Security Instruments AMIB3051SC is one of the first smoke detectors designed to the latest UL 217 standard for smoke alarms, which makes smoke detectors better at reducing false alarms related to cooking. This model receives high scores in our tests for both flaming fires and smoldering fires, and it runs on a built-in 10-year alkaline battery. It also features a hush button, but it can’t interconnect with other detectors.

Kidde KN-COSM-IBA

CR’s take: The hardwired Kidde KN-COSM-IBA CO detector performs very well. It receives top-level marks in our low-CO-level test and for the accuracy of its CO-level display, and a near-top-level mark in the high-CO-level test. The model has the ability to log the highest CO levels it detects—referred to as peak memory—which is good for checking to determine whether there has been a problem when you’ve been away from home for a long period of time. It also has a battery backup and the ability to interconnect with other compatible alarms.

First Alert CO615

CR’s take: The First Alert CO615 is one of the few plug-in CO detectors in our tests, and it beats out its hardwired and battery-powered brethren, with strong scores in our tests for detecting high and low CO levels quickly, as well as a respectable rating for the accuracy of its CO level display. It features a battery backup and peak memory, so you can check to see whether CO levels have been high after you’ve been gone from home for a long period of time.

First Alert OneLink SCO501CN

CR’s take: If you need a battery-powered CO detector, check out the First Alert OneLink SCO501CN . It excels in our tests for detecting high and low CO levels, as well as for the accuracy of its CO readings. When the alarm detects CO, an 85-decibel siren and voice alarm (with 11 programmable locations) indicates where and what the development is. Aside from voice alerts, this model features the ability to wirelessly interconnect with other First Alert-enabled alarms. The alarm has a peak memory feature, which logs the highest CO reading so that you can see whether there was a problem while you were away from home.

Universal Security Instruments AMICH3511SC

CR’s take: If you need a hardwired combination detector, the Universal Security Instruments AMICH3511SC is your best bet. It performs excellently in our low-CO-level test, as well as in our smoldering fire and flaming fire tests. It earned an adequate score for detecting high CO levels. It’s rated to protect against smoke, fire, and carbon monoxide, and it comes with a sealed battery that should last for 10 years.

Universal Security Instruments MIC3510SB

CR’s take: The Universal Security Instruments MIC3510SB is one of the few combination detectors that has both photoelectric and ionization sensors for smoldering and flaming fires (most combo models have only one of the two) in addition to a CO sensor. As a result, this USI detector is the only combination model to perform well across all our smoke and CO tests. This model runs on a sealed, 10-year battery and it has a hush button. But it can’t interconnect to other detectors.

First Alert Onelink Smart 1042135

CR’s take: For a smart smoke and CO detector that connects directly to WiFi, check out the First Alert Onelink Smart 1042135 . This model receives strong scores in all our tests, with the exception of flaming fires because it lacks an ionization sensor. If you go with this detector, you may want to also consider purchasing a battery-powered ionization smoke detector, such as the Kidde RF-SM-DC . This First Alert comes in both battery-powered and hardwired versions, can interconnect with other compatible detectors, and works with Amazon Alexa and Apple HomeKit/Siri for voice and app control.

First Alert ZCOMBO

CR’s take: The First Alert ZCOMBO is a smart smoke and CO detector that’s certified to work with Ring’s Home Security System , where you can work the detector through the Ring app on your phone. It received top marks in our smoldering fires test and was able to accurately and quickly detect low CO levels. It performed poorly when detecting flaming fires, though. The First Alert ZCOMBO is battery-powered.

Google Nest Protect: Smoke + Carbon Monoxide

CR’s take: The Google Nest Protect is another WiFi-enabled combination smoke-CO detector that performs well in our tests. It receives strong scores in our tests for low CO levels and smoldering fires, as well as a good rating for detecting high CO levels. But like the First Alert Onelink , it falls short in our flaming fire test. If you go with this detector, you may want to also consider purchasing a battery-powered ionization smoke detector, such as the Kidde RF-SM-DC . The Google Nest Protect comes in both battery-powered and hardwired versions and can interconnect with additional Nest Protects.

Daniel Wroclawski

Dan Wroclawski is a home and appliances writer at Consumer Reports, covering products ranging from refrigerators and coffee makers to cutting-edge smart home devices. Before joining CR in 2017, he was an editor at USA Today’s Reviewed, and launched the site’s smart home section. In his spare time, you can find him tinkering with one of the over 70 connected devices in his house. Follow Dan on Facebook and Twitter @danwroc .

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The Best Smart Smoke / CO Detectors and Monitors of 2024

Recommendations are independently chosen by Reviewed's editors. Purchases made through the links below may earn us and our publishing partners a commission.

Why trust Reviewed?

Reviewed's mission is to help you buy the best stuff and get the most out of what you already own. Our team of product experts thoroughly vet every product we recommend to help you cut through the clutter and find what you need.

Nest Protect

Choose from battery or hardwired models

Nest App runs on iOS and Android devices

Quick setup

Nothing we could find

Kidde Smart Smoke + Carbon Monoxide Alarm

Helpful voice alerts

Works with Amazon Echo and Google Home

Sends alerts right away

First Alert Z-Wave Plus Smoke/CO Alarm (2nd Gen)

Great for Ring Alarms

Loud alarm tone

Sends smart alerts quickly

Needs Z-wave hub

Alexa functionality doesn't work

Abode Smoke Alarm Monitor

Sends alerts to your mobile device within seconds

Battery-powered

Easy installation

Requires additional devices in order to use

First Alert Onelink Safe and Sound (Hardwired)

Built-in Bluetooth speaker

Alexa-enabled

Customizable night light

App crashes often

Difficult to install

Updated March 10, 2022

It takes about five minutes to set up the Nest Protect, and the process is impressively thorough, asking you for the detector location, as well as your self-testing and night light preferences.

The Nest Protect Smoke & Carbon Monoxide Alarm is a reasonably priced smart detector with ample functionality. The 2nd generation Nest Protect comes in both battery operated and hardwired models, and instead of traditional photoelectric or ionization technology, this alarm uses a split-spectrum sensor to monitor for both smoldering and fast-burning fires. In addition to sending you push notifications when it detects smoke or carbon monoxide, it offers voice alerts, a night light option, low-battery alerts, and a monthly self-test feature.

It takes about five minutes to set up the Nest Protect, and the process is impressively thorough, asking you for the detector location, as well as your self-testing and night light preferences. The Nest app is intuitive and easy to use on both iPhones and Androids—not surprising given that Nest is a leader in the smart home space. In our tests, the smartphone notifications arrived around 30 seconds after the alarm sounded, which wasn’t the fastest, but we liked that the alerts specify whether it’s a just a “Heads Up” (a little bit of smoke) or a genuine “Emergency” (get out of the building).

Overall, we’d feel safe with this smart smoke alarm protecting our homes, and there are thousands of positive reviews that testify to the superior performance of this product. Plus, it’s significantly less expensive than other comparable smart smoke detectors with similar features.

How We Test Smart Smoke Alarm and Carbon Monoxide Detectors

I’m Rachel Murphy and I cover mart home for Reviewed. From household linens to smart home gadgets, I've been doing product testing for a number of years. And, like most people, I want to keep my humble abode as safe as possible. That's why I dived back into the world of smart home to test the best smart smoke and carbon monoxide detectors available today. My work is built up Camryn Rabideau, a freelance contributor for Reviewed.

To test these smoke detectors, we first installed and synced each device with its app. After the initial setup, we ran a “self-test” on each model and navigated around both the iOS and Android versions of the apps to assess usability.

Finally, we used aerosol-sprayed smoke and tapered candles to set each alarm off. We did this multiple times for every model—once while the phone was connected to Wi-Fi and once when it was not—to see if there was a difference in how quickly notifications were delivered. During these tests, we also evaluated the smart home integration, quality/volume of the alarm, quality of the smartphone notifications, and ease of silencing each detector. Other factors we took into account were interconnectivity, app connectivity, and perceived reliability.

What You Should Know About Smart Smoke Carbon Monoxide Detectors and Monitors

What is a smart smoke alarm.

Like most smart home devices, smart smoke and carbon monoxide detectors connect to your home’s Wi-Fi and, subsequently, your smartphone. In other words, they go a step further than your traditional smoke alarm. This is the main appeal of smart smoke detectors, but some high-end models include additional “smart” features like voice controls via Alexa, weather updates, voice alerts, customizable night lights, and more.

What is a Monitor?

Monitors essentially “listen” for your smoke and carbon monoxide alarm, and if they hear it going off, they send a smartphone notification to let you know. They're typically installed in proximity to your existing smoke detectors—some plug into an electrical outlet while others are battery operated—and they’re connected to your home Wi-Fi network. However, they don’t allow you to silence your smoke alarms and they won’t save you from 2 a.m. low-battery chirps.

Why Does it Make Sense for Smoke Alarms Be "Smart"?

Smoke detectors are a perfect example of a device that benefits from smart functionality. Why? Standard detectors have a few major shortcomings, mainly that they’re not all that useful when you’re not home. If your detectors aren’t connected to the local fire department (which most are not) and a fire starts when no one is home, the alarms simply beep away to no avail. Plus, that’s not to mention the dreaded 3 a.m. low-battery chirps—we could all live without those.

Smart smoke detectors solve both these issues, as they send you smartphone notifications when the alarm goes off and give you a heads up when the battery is low. The "smart" functionality can not only give you peace of mind while you're away from home, but it can also save you time and energy when it comes to replacing those pesky smoke alarm batteries. Plus, if you ever burn popcorn and accidentally set off your smart alarm, you can quickly silence the detector from its app, saving you from having to grab a chair and climb up there to manually silence it.

Photoelectric vs. Ionization Smoke Detectors

There are three types of smoke detectors you can buy: photoelectric, ionization, and dual-sensor. These terms refer to the technology used to sense smoke.

Photoelectric smoke detectors have a light source that’s pointed into a sensing chamber, and when smoke particles enter the chamber, they reflect light onto the sensor, triggering the alarm. This type of smoke detector is more efficient at sensing fires that begin with a long period of smoldering, according to the U.S. Fire Administration.

On the other hand, ionization smoke detectors have a small amount of radioactive material between two electrically charged plates. This ionizes the air (hence their name) and creates a current that flows between the plates. If smoke particles enter the chamber, it will disrupt the current and activate the alarm. This style of smoke detector will typically sense flaming fires more quickly.

There are also dual-sensor smoke detectors, which use both photoelectric and ionization technology. For comprehensive protection in your home, the U.S. Fire Administration actually recommends dual-sensor detectors, which efficiently monitor for both types of fires.

Additionally, make sure to use a unique, strong password composed of multiple characters, numbers, and letters for each of your smart home accounts. Data breaches feel like the norm as of late, making it all the more important to use different passwords across multiple websites and apps.

Other Smart Smoke Carbon Monoxide Detectors And Monitors We Tested

Second to the Nest Protect, the Kidde Smoke and Carbon Monoxide Detector is one of the smartest we’ve tested. The device , available exclusively at Home Depot, offers a full spread of smart home functionality with Amazon Echo and Google Home, is simple to set up and use, and should last a decade before you need to replace it.

Installation requires existing wiring (120V AC). As long as you don’t run into any snags with your wires, the physical installation process is simple and takes about five minutes (don’t forget to flip off the breaker before you begin). A built-in lithium backup battery (estimated lifespan of 10 years) ensures that the monitor remains on during a power outage.

Like the Nest Protect, the Kidde detector uses voice warnings to alert you of fire or carbon monoxide instead of a traditional alarm tone. The alerts aren't as detailed as what's available on the Nest Protect, which tells you exactly what room or area of the home the problem is in. But the Kidde alerts are loud, easy to understand, and more calming than the blaring sounds put out by most other detectors. The device can also be interconnected with other Kidde smoke and carbon monoxide detectors for whole-home coverage.

The Kidde Smoke and Carbon Monoxide Detector may not be as feature-filled as the Nest Protect, but the device gets closer to achieving Google's helpful emergency smarts than most, and offers more versatility should you switch to Alexa. Kidde is also the more affordable of the two detectors, making it a mighty fine choice for anyone who doesn't want to pay a premium price for Nest.

The detector doesn’t work with Apple HomeKit or Google Home, but it is compatible with the Amazon Echo ecosystem. Supposedly the device can make announcements using Echo smart speakers and displays when the detector needs attention, but this feature did not work for us. However, between the push alerts and multiple alarm tones, it’s hard to miss any alarm events.

When you use the device with a Ring Alarm or Ring Alarm Pro base station (coupled with a paid Ring Protect Pro plan), emergency responders will be automatically notified by Ring's professional monitoring team when the device detects a problem at home. One advantage of pairing it with the Ring Alarm Pro, which has a built-in Wi-Fi router, is that it can keep the detector online even during a Wi-Fi outage. (The Ring Protect Pro plan is required to access the base station’s 24/7 internet backup service.)

Though it’s got a couple of setup and usability quirks, the First Alert 2-in-1 Smoke and Carbon Monoxide Alarm (second-gen) is a fantastic choice for smart homes reliant on Z-wave hubs.

The Abode Smoke Alarm Monitor gets top marks in terms of performance—it sends push notifications to your phone within seconds of hearing a smoke alarm go off and, unlike other monitors we tested, it also gives off a high-pitched siren of its own.

This battery-powered smoke alarm monitor is easy to install—you can either use screws or double-sided tape to mount the small unit on the ceiling near your existing smoke detectors. It’s also straightforward to pair with the associated app, which is intuitive and easy to use. You can quickly silence the monitor from the app, and we liked that this system sends out push notifications if it ever loses a Wi-Fi connection.

The major downside of this particular monitor is that it must be paired with the Abode Gateway, and the brand’s basic “Starter Kit” costs $199. However, if you already have the gateway or are interested in a DIY security system, this monitor would be a great choice.

If you’re looking for a smart smoke and carbon monoxide detector that has tons of functionality, the First Alert Onelink Safe & Sound is a good option that sends push notifications quickly. It also ha other features like a built-in Bluetooth speaker, customizable night light, and Alexa functionality.

During our testing, the Onelink Safe & Sound pushed out smartphone notifications as soon as the detector went off, and it was easy to silence alarms via the app. Both the voice announcements and speaker quality were impressive, but the Onelink app itself isn’t the best, crashing fairly frequently. Additionally, this smart smoke alarm was a challenge to install—it was nearly impossible to clip into the mount, and once you do get it in, it probably won’t come off.

Overall, this smart smoke and carbon monoxide detector is packed with smart features and does its main job well, alerting you immediately with push notifications if it ever goes off. However, it’s more expensive than others we tested, and a lot of the features that command its higher price seem kind of unnecessary. If you like the idea of using your smoke detector to play music or as an Alexa device, you can feel secure that this device will protect your home and family, but if the extraneous features don’t appeal to you, there are cheaper, equally reliable options, such as the Nest Protect.

The X-Sense Wi-Fi Smoke Detector is a compact, lithium battery-powered device that uses photoelectric sensors to detect smoke (but not carbon monoxide levels like others in our guide).

The device isn’t compatible with the Amazon Echo or Google Home ecosystems, but remote management is available in the TuyaSmart app for iOS and Android. The device doesn't have the intuitive features and helpful smarts of the Nest Protect, but the trade-off here is that it’s also one of the least expensive smoke detectors in our guide.

Some Amazon reviewers report difficulties connecting the device to Wi-Fi during setup. We didn’t have any connection issues (using a dual-band Eero Mesh Wi-Fi router), but the alarm does need a 2.4 GHz wireless network in order to work.

It took the X-Sense Wi-Fi Smoke Alarm several seconds longer to detect smoke than the Nest Protect, but alerts were sent quickly once the siren started to sound. The 85-decibel tone is loud enough to hear from a room over, but it is harder to hear if you’re across the house or in the garage. To remedy this, you can connect multiple X-Sense smoke alarms on the same Wi-Fi network, so that when one sounds, they all do. When the alarm goes off, a blinking red light on the alarm serves as a helpful visual clue.

In the X-Sense app, you can silence the alarm, view the alarm’s history, and review results from the device’s automatic self-checkups. One issue we experienced with that app is that it continued to show there was a fire danger after the smoke had cleared. It took a couple of minutes for the app to show that everything returned back to normal.

The alarm takes a CRR123A 3-volt lithium battery, which isn’t as common as the AA or 9V batteries you’ve probably got floating around your junk drawer. Low battery notifications are sent when it’s time to pop in a new one. Registering the device with X-Sense activates a seven-year warranty.

The X-Sense Wi-Fi Smoke Alarm falls short on features compared to other detectors in our guide, but it is one of the cheapest options.

Small and compact

App-controlled

No carbon monoxide detection

Not compatible with Alexa or Google Assistant

Cheap build quality

We had high hopes for the second generation First Alert Onelink Smoke and Carbon Monoxide Detector, but this model had many of the same problems as the original version. This updated alarm is now compatible with Android phones (the first generation wasn’t), but the app still crashes and the pairing process is still clunky and glitchy.

Further, we found this smoke and carbon monoxide detector had connectivity issues. Several times when we tested it via the app or set it off with artificial smoke, the app never even registered the action. We spoke with Onelink support to resolve these issues, and they noted the detector can have problems if it’s too far from the Wi-Fi router or if there’s interference from other appliances. Overall, we just don’t feel confident recommending this product, as its smart features don’t seem to perform reliably and may not let you know if there's an emergency when you're not home.

Runs on batteries

Fast push notifications

Minimal app features

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Prices were accurate at the time this article was published but may change over time.

Meet the testers

Camryn Rabideau

Contributor

Camryn Rabideau is a full-time freelance writer and product tester with eight years of experience. She's been lucky enough to test hundreds of products firsthand, and her specialties include bedding and pet products, which often require help from her two dogs, three cats, and flock of rambunctious chickens.

Rachel Murphy

Editor, Home

Rachel Murphy is Reviewed's home editor. She holds a journalism degree from the University of Central Florida. Prior to joining the team, she worked as a freelance writer for publications like Insider and Mashable, and as an associate editorial producer for Good Morning America. Aside from smart home tech, her interests include food, travel, parenting, and home renovation. You can usually find her sipping on coffee at any time of the day.

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The 12 Best Carbon Monoxide Detectors to Protect You and Your Family

No living space should be without several of these inexpensive, live-saving devices.

Gear-obsessed editors choose every product we review. We may earn commission if you buy from a link. Why Trust Us?

CO can be found in fumes produced by items like power generators , stoves, lanterns , grills , wood-burning fireplaces , gas ranges, or furnaces, and also the vehicles we drive every day. If CO builds up indoors or in your car, it can overcome you quickly and without warning, which is why it's not surprising that every year more than 400 people in the U.S. die from accidental carbon monoxide poisoning, according to the Centers for Disease Control and Prevention. The most common symptoms of CO poisoning are headache, dizziness, weakness, nausea, vomiting, chest pain, and confusion.

As grim as this all sounds, prevention is possible and costs less than $20. Here are our recommendations for carbon monoxide detectors along with valuable advice before you shop.

Best Carbon Monoxide Detectors

• Best Overall: First Alert Hardwired Talking Smoke and CO Detector
• Best Upgrade: Kidde Carbon Monoxide Detector AC-Powered with Battery Backup
• Best Value: Kidde Battery Operated CO Alarm
• Best Digital Display: First Alert Dual-Power Plug-in CO Alarm
• Best Mounting Option: Kidde Nighthawk AC Plug-in with Battery Backup The Expert: I’ve worked in the home security industry for the better part of a decade testing, reviewing, and writing about home security and home safety equipment. Along with writing disaster preparedness guides for homeowners, I’ve also done extensive research on air quality and pollution. As a parent of young children, I’ve used and regularly tested environmental monitoring devices like smoke and carbon monoxide alarms on every level of my home.

How to Choose a Carbon Monoxide Detector

Power sources.

Carbon monoxide (CO) detectors can be battery-operated, plug-in, or hardwired (with backup batteries for power failures). Battery-operated alarms are easy to install and budget-friendly, but have disadvantages.

In exchange for the work of wiring in a carbon monoxide alarm, you’ll get an extended lifespan of 7 to 10 years. Battery-powered devices, however, may need to be replaced every 3 to 5 years. Double-check city building codes because hard-wired smoke and carbon monoxide detectors are increasingly required in new construction.

Home Safe Home: Best Smoke Detectors • Best Home Security Systems • Best Outdoor Security Cameras

Sensor Types

Carbon monoxide alarms use a variety of detection methods, and the kind of sensor is often directly related to the power source. Keep in mind that carbon monoxide alarms can also include smoke detectors, which have ionization sensors for detecting fast-burning fires or photoelectric sensors to detect smoldering fires. Some smoke detectors have both and are therefore called dual-sensor alarms.

Interconnected

If you live in a multilevel home, consider hard-wired or smart carbon monoxide alarms that can be interconnected. By placing several units around the house, you create a network for better coverage and detection. According to the U.S. Consumer Product Safety Commission (CPSC) , carbon monoxide alarms should be placed about 5 feet off the ground on every level of the house (except basements and attics) and outside of sleeping areas.

UL Certified

UL-certified carbon monoxide alarms are recommended because they’ve been third-party tested and meet the UL-standards for consumer safety and effectiveness . This is important in carbon monoxide detection as alarms are required to sense CO levels consistently at a fairly low threshold.

Basic detectors are simple alarms, but sophisticated models come with features like digital displays, LED warning lights, voice alerts, location detectors that pinpoint the source of a leak, or memory functions that record levels of carbon monoxide over time. There are also smart carbon monoxide detectors that connect to your home's digital ecosystem.

How We Evaluated Carbon Monoxide Detectors

We researched carbon monoxide detection through the US Consumer Safety Commission and connected with a fire protection expert from UL Standards (Underwriter’s Laboratory) to better understand critical features in residential carbon monoxide detection.

We also relied on the research of Rachel Klein , who sifted through user reviews to determine how these detectors performed in the real-world. The results of our combined efforts are high-quality, four-star rated models that offered a variety of desirable features. Each device we reviewed and recommended below is UL-certified and also specifies dimensions so you can map out how much space is required for installation. These are the best carbon monoxide detectors to buy now.

First Alert Hardwired Talking Smoke and Carbon Monoxide (CO) Detector

Combining carbon monoxide and smoke detection into one device makes sense. This talking model from First Alert is packed with even more functions, like programmable locations and voice alerts, into a relatively affordable package.

Since this combination CO and smoke alarm is hard-wired, it comes with a 10-year warranty and can connect with other First Alert detectors to provide whole-home environmental monitoring. Watch out for triggering false alarms though. At 85-decibels, the neighbors are definitely going to notice.

Kidde Carbon Monoxide Alarm AC-Powered with Battery Backup

This carbon monoxide detector is another customer favorite. The plug-in unit is well-priced, fairly compact, has a memory feature that records carbon monoxide readings, and includes an 85-decibel alarm.

In the event of a power failure, two included AA batteries serve as backup. Given the smaller footprint, its test button is a thin bar that isn’t designed as well as that of some other units, but the easy plug-in installation is a major perk.

Kidde Battery-Operated Carbon Monoxide Alarm

If you’re looking for a reliable yet budget-friendly carbon monoxide detector, this a good bet. It checks the boxes for basics you need for continuous monitoring, including a pulsing red LED warning light and an 85-decibel alarm that trigger simultaneously if carbon monoxide is detected.

There’s also a sizable test-and-reset button to ensure the unit is working. It runs on two AA batteries, which are included.

First Alert Dual-Power Carbon Monoxide Plug-In Alarm

The blue backlit LED display on this plug-in carbon monoxide detector makes it easy to see CO readings—a definite plus in an emergency situation—and power level of the two backup AA batteries. It also has a peak memory feature that records readings.

Other highlights include a test-silence button to ensure the unit is functioning properly, an 85-decibel alarm, and a limited 7-year warranty.

Kidde Nighthawk AC Plug-in Operated Carbon Monoxide Alarm

Even without a backlit display, the popular plug-in Kidde Nighthawk ranks highly for ease of reading, plus it has a memory feature for recording peak CO levels. It has an extension cord that allows you to set it on a shelf if you'd prefer that type of placement over keeping the entire unit wherever your outlet is.

Included with the Nighthawk is a 9-volt backup battery so you don’t have to worry about protection during a power outage. It has a standard 85-decibel alarm, and there’s a blinking dot in the corner of the display to let you know the device is functioning properly.

First Alert Carbon Monoxide Alarm with 10-Year Battery and Digital Temperature Display

Sleek and slim, this battery-operated carbon monoxide detector packs in plenty of features. It also doubles as a digital clock, so it's right at home on a nightstand or placed on a shelf. Its bright blue backlit LED display shows the temperature as well as carbon monoxide levels.

Other highlights include a 10-year lithium battery, an 85-decibel alarm, and a 10-year limited warranty. It doesn’t provide the kind of comprehensive coverage that full-size carbon monoxide detectors deliver, but it’s a nice supplemental device for extra peace of mind.

First Alert Wireless Interconnected Carbon Monoxide Alarm with Voice and Location

Although this battery-powered carbon monoxide detector comes with a big jump in price compared to some of our recommendations, it packs some great features. It has a voice alarm, plus it can be connected to other units to create a wireless network for blanket coverage in your home.

Once the exact location of carbon monoxide is detected, it pings the other units and triggers the voice alarm. What is missing is an LED warning light, a feature included on detectors that cost much less than this First Alert. Two AA batteries are included for installation.

Kidde Battery-Powered Smoke & Carbon Monoxide Detector

This combination smoke detector and carbon monoxide alarm features voice alerts, LED lights, and a low-battery warning—all for a similar price point to other devices that only offer CO detection. If that doesn’t convince you, this Kidde alarm runs on AA batteries instead of the typical (and more expensive) 9-Volt.

A few reviewers reported that the unit was very sensitive to any type of heat and threw more false alarms than other detectors—just something to keep in mind as you do your own further research.

Universal Security Instruments 3-in-1 Smoke, Fire, and Carbon Monoxide Smart Alarm

There are many carbon monoxide detectors that come with smoke detectors that have single sensors—either ionization or photoelectric—but this one features a dual sensor to detect both fast-burning and smoky fires. The device is powered by a sealed 10-year battery and features microprocessor technology to cut down on false alarms, and a hush button in the event that they happen.

Overall, it gives you great bang for your buck in terms of complete protection, minus extras like a voice alarm and digital display.

Google Nest Protect

If you have a Google Home ecosystem, this is the carbon monoxide and smoke detector combo you'll want. It sounds the alarm for dangerous levels of carbon monoxide and has a split-spectrum sensor that detects fast-burning fires and smoky, smoldering ones by combining a traditional infrared photoelectric sensor with a blue LED.

When the alarm is triggered, you’ll get notifications on your phone, plus the app allows you to test alarms and get performance reports.

You won’t have to worry about checking the battery or sensors, as the Nest Protect runs diagnostics 400 times daily. It also doubles as an optional hallway light that’s triggered when you walk underneath. The device also comes in a hardwired version if you prefer that to batteries.

First Alert Hardwired Carbon Monoxide Detector

This might not be the best looking carbon monoxide detector in the bunch, but safety comes first—and on that, it delivers. The hardwired unit has a 9-volt battery backup in case of a power outage, with an advanced electrochemical sensor and microprocessor that helps cut down on the frequency of false alarms. It’s also interconnectable with up to 18 compatible devices for blanket coverage.

Other highlights include a visual indicator that shows which unit triggered the alarm within the network, an 85-decibel alarm, and a test and silence button. The drawbacks are no voice alarm or LED warning light.

Gzair Portable Carbon Monoxide Detector

This ingenious little keychain is a carbon monoxide detector in disguise. It has an electrochemical sensor, with a combined microprocessor and pump that produce CO readings on the display.

If levels are dangerously high (200ppm or more), the device sounds a 90-decibel alarm—along with a flashing red light and strong vibration. It’s powered with a 9-volt battery and made for outdoor use, with an IP67 waterproof rating. It’s ideal for travel, but is also suitable for camping, motorhomes, tents, and basements.

Expert Kaz Weida Finds Out How Often a Carbon Monoxide Alarm Should Be Replaced. The Answer Might Surprise You.

Where should carbon monoxide alarms be placed in a home for optimal detection?

It’s critical that consumers follow the manufacturer’s instructions on where and how to install the CO alarm. Failing to do so could introduce variables that comprise the alarm’s performance and effectiveness—and with carbon monoxide, there can be serious consequences.

Time is also an important consideration. CO alarms should be replaced within seven years of the manufacture date marked on the product because the CO gas sensing element of the device is considered a limited-life component.

Which features are absolutely essential for homeowners to have in a carbon monoxide alarm?

You can choose a combination smoke and carbon monoxide alarm, and you can choose among battery-powered, hardwired, or plug-in power sources. If the alarm is being used in a residence, it’s important to look for one that is third-party certified to UL standards and to follow the manufacturer’s instructions on where and how to install the device.

We call them carbon monoxide detectors, but that’s sort of a misnomer. What’s the difference between carbon monoxide detectors and carbon monoxide alarms?

While both alarms and detectors sense whether carbon monoxide concentrations have reached unsafe levels, the key difference between the two is often dependent on where they are commonly used—in a residential or commercial setting.

Most consumers are buying carbon monoxide alarms for their homes. Carbon monoxide detectors are devices connected to an alarm control unit with a sensor that responds to carbon monoxide, and are typically found in a commercial setting where they are installed, maintained, and inspected by a professional.

Kaz Weida is a former educator turned freelance journalist who started off producing reviews and guides in the home security and telecom industry in 2015; she has tested, researched, and reviewed more products than she count, be it air quality monitors or kids GPS trackers. Kaz had bylines in a wide array of publications and sites including HuffPost, BlogHer, SheKnows, SafeWise, CableTV, and Rosetta Stone, and her work has been featured in Medium, Womens E News, Scary Mommy, and Salt Lake City Weekly. When she's not at her desk, Kaz is in the kitchen crafting and photographing cocktails. 

Diane Haithcock began working for the UL enterprise in 1998 as a project engineer in fire protection. In 2010, she transitioned to the Programs team of UL Standards & Engagement. In this capacity, she serves as chair of ULSE Technical Committees, convening panels of experts to develop and maintain consensus safety standards for the United States and Canada. The standards in her portfolio cover building materials, life safety, and physical security. Haithcock holds a Bachelor of Science in mechanical engineering from Florida International University.

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Best Portable Carbon Monoxide Detector for Travel

If you are an avid international traveler, you have heard about the ill effects of carbon monoxide poisoning. The way to keep your family safe while traveling is to be prepared. Here’s why I believe the Handheld CO Detector by GZAIR is the best portable carbon monoxide detector for travel.

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Table of Contents

Best Carbon Monoxide Detector for Travel

The reason behind our interest in a portable carbon monoxide detector was our upcoming second trip to Sandals Royal Bahamian . According to the Washington Post , Sandals Resorts has said it will place carbon monoxide detectors in the rooms at all 16 Caribbean resorts.  However, for peace of mind, we are traveling with our own hand held gas detector.

What is carbon monoxide?

• Carbon monoxide sources
• How to protect yourself from carbon monoxide while traveling
• Handheld CO detector: GZAIR
• How the portable carbon monoxide detector for travel works
• Best location for the CO alarm
• Packing a carbon monoxide detector for travel

The Department of Health defines Carbon Monoxide (CO) as an “odorless, colorless gas formed by the incomplete combustion of fuels.” When you are exposed to CO gas, the CO molecules displace the oxygen in your body and leads to poisoning.

The US Consumer Product Safety Commission says the health effects of CO depend on the CO concentration and length of exposure. Most people will not experience any symptoms at CO levels of approximately 1 to 70 PPM (parts per million).

Carbon Monoxide Sources

• Fireplaces, both gas and wood burning
• Gas stoves and ovens
• Motor vehicles
• Grills, generators, power tools, lawn equipment
• Gas-powered heaters, water heaters, portable generators

How to Protect Yourself from Carbon Monoxide While Traveling

Common signs of CO poisoning are headache, dizziness, difficulty breathing, nausea and/or fainting. Forbes.com suggests the top ways to protect yourself from CO are to stay in well-ventilated rooms, know where the fire exits are and bring a carbon monoxide detector .

Handheld CO Detector: GZAIR

This carbon monoxide monitoring device by GZAIR SA103 is perfect for us due to its size. Our main goal was to find a small portable CO monitor compact enough to pack in a carry-on.

Here’s why this portable co2 monitor should be on your packing list!

As mentioned above, the portable size of this device is a BIG bonus. Smaller than an iPhone, it packs easily in my carry-on bag or purse. Weighing just 4.4 ounces, it won’t weigh you down either.

2. Longevity

This CO detector is on the pricey side. The good news is the handheld detector lasts two full years from the date of first use. In addition, the battery can be replaced without replacing the entire device.

3. Waterproof Design

Due to its rugged housing, the personal gas monitor will withstand the abuse of travel. It is also waterproof. This makes it ideal for use on a boat, camping or if left in a resort bathroom.

4. Easy to Use

With only two buttons, the portable carbon monoxide device is easy to operate. Simply hold the ON/OFF button for 4 seconds to turn on and off. When turning off, hold the button until the LCD is off, then release your finger. During this process, you will see a countdown from 4 to 1.

See my YouTube video from our recent vacation to Wentworth by the Sea. The video displays how easy it is to turn on, how long it takes to start up and placement in our hotel room.

5. Multi-Use

This travel carbon monoxide alarm is ideal for the adventurous traveler. Whether you visit luxury all-inclusive resorts, enjoy outdoor glamping or camping, road trip in a campervan or motorhome, or cruise on a sailboat this compact device can accompany you.

How the Portable Carbon Monoxide Detector for Travel Works

If the sensor detects CO gas concentration exceeds 50 PPM, an alarm (95dB), strong vibration, and light will go off. The device reads in real-time so once the room returns to normal CO levels, the readout should return to 0.

Best Location for the CO Alarm

As carbon monoxide is lighter than oxygen, greater concentrations will be found higher. It is best and most effective to place your portable detector on a shelf or counter.

Packing a Carbon Monoxide Detector for Travel

According to the FAA , devices containing lithium-ion batteries must be placed in carry-on baggage when possible. Pick a bag that will fit in the smallest overhead bin or under the seat in front of you. We always fly with this Osprey travel backpack as it’s soft-sided and can squeeze into most spaces.

I hope this post on the best portable carbon monoxide detector for travel is helpful. Pin to Pinterest to save for your next travel packing list. Thanks for stopping by the blog!

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Battery Operated Travel Carbon Monoxide Alarm

• Description

Protect yourself while you travel with this battery operated First Alert Carbon Monoxide Travel Alarm. One button tests all alarm functions as well as mutes unwanted alarms. This carbon monoxide alarm utilizes an electrochemical sensor for increased accuracy. Has easy access to the battery and a durable/lightweight design for optimal portability. 9V battery and travel pouch included. 5-year limited warranty. Carbon Monoxide alarm meets UL standards.

• The carbon monoxide alarm needs to be relocated. Carbon monoxide alarms should be located 15-20 feet away from all fossil fuel burning sources like furnaces and stoves. Alarms should be located 10 feet away from sources of humidity like showers.
• Fossil fuel burning appliances may not be burning fuel completely. Check pilot lights/flames for blue color. Appearance of yellow or orange flames indicates incomplete combustion-a source of carbon monoxide.

First Alert Battery Operated Travel Carbon Monoxide Alarm Features:

• Battery operated, 1 9V battery included.
• Single button tests alarm function and mutes unwanted alarms.
• EZ access battery door.
• Low battery signal.
• Electrochemical sensor, most accurate technology available for detecting carbon monoxide, compared to other common sensing technologies.
• Loud 85db alarm.
• Meets UL2034 standard.
• Travel pouch, mounting hardware (if desired) and 9V battery included.
• 5-year limited warranty, carbon monoxide alarms should be replaced every 5 years for maximum protection.
• Emits T3 Pattern.

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Overall Rating

First alert battery operated travel carbon monoxide alarm - co250t reviews, thomas bierman, small, but great.

This travel CO detector is great. Small and lightweight for travel needs!

Harrison H.

This is very useful, I recommend it.

Jack Parrack

Travel co alarm gives me peace of mind.

Recent stories about people being hurt or killed by carbon monoxide in hotel rooms that did not have CO alarms prompted me to look for a travel CO alarm. The First Alert travel CO alarm is perfect. Its small size makes it easy to take on trips, and the reliability of First Alert gives me peace of mind. My home is protected by First Alert Smoke/CO alarms, so why wouldnt I trust them to keep me safe while Im on the road.

Robert Castro

Travel co alarm.

I have First Alert carbon monoxide alarms in the recommended places in our house. However, I was surprised to learn that hotels are not required to have CO detectors in rooms. After media reports of 3 fatalities in the same NC hotel room in 2 months prompted me to purchase the F.A. battery powered CO detector for out of town stays. The detector alarm is quite loud and will wake you out of a sound sleep. I do recommend removing the battery if transporting it inside luggage otherwise pressure on the test button may delay you clearing TSA screening. Otherwise, its a great product that everyone should have. Think about it this Christmas, you could give a gift that might save a familys life.

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3 Pack Combination Smoke and Carbon Monoxide Detector Battery Operated, Travel Portable Photoelectric Fire&Co Alarm for Home, Kitchen

About this item.

• Combo smoke detector/carbon monoxide alarm detects two threats
• Electrochemical CO sensor alerts you to carbon monoxide danger
• Photoelectric sensor detects smoke while minimizing false alarms
• Battery-operated unit installs quickly and easily without an electrician，A single button tests the unit or silences the alarm. Low battery signal mute, quiets low battery signal for up to 8 hours
• ARRANTY AND SERVICE: Our products provide after-sales service. If you have any questions about our products, you can contact us, we will reply to you as soon as possible within 24 hours.

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Lecoolife is a young and energetic brand,There are any alarms you need here, whether it is to detect smoke, CO etc.. Lecoolife is your trusted home security assistant.

It is our ambition to provide the best and most user-friendly smart home products, at the best prices, for the sake of customers

smoke carbon monoxide detector

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Customer Review: Avoid your life depends on them!! I tested 3 and all failed smoke and carbon monoxide!!!!

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Customers say

Customers like the value, ease of installation, and performance of the gas smoke fire alarm. They mention that it looks nice for the price, and is easy to mount. Customers also like the performance. However, some customers have issues with brightness, and noise. Opinions are mixed on appearance, quality, and battery life.

AI-generated from the text of customer reviews

Customers find the installation of the gas smoke fire alarm to be easy. They mention that it's a great little bundle and that the batteries are included.

"Good price, easy to install , seem to be working." Read more

"...They were quick and easy to install and worked well on testing...." Read more

"... Installed easy and worked perfect has scared us many times with the carbon detection but well worth it everything you need in a detector highly..." Read more

"Overall, this smoke detector/CO monoxide detector was really easy to install and lasts for some time...." Read more

Customers like the value of the smoke detector. They say it's a great product, with top quality for the price.

"...The price is the best of all that is offered on Amazon and the detectors do really work...." Read more

" Good price , easy to install, seem to be working." Read more

"The price for the 3 pack was great . We used them in the 'In-Laws' old house...." Read more

"Bought for my home, a neighbor's house and a rental property. Great value and relief knowing we are all protected." Read more

Customers like the performance of the gas smoke fire alarm. They mention that it works great, the detectors do really work, and they tested effectively. Some say that they have had no issues with the product and that it arrived promptly.

"...The price is the best of all that is offered on Amazon and the detectors do really work ...." Read more

"Good price, easy to install, seem to be working ." Read more

"...They were quick and easy to install and worked well on testing ...." Read more

"...My old detector would’ve gone off. Would not recommend. Does not work . Glad I learned it this wayP.S. The blinking light was vexing...." Read more

Customers are mixed about the quality of the gas smoke fire alarm. Some mention that it's a good pack of smoke detectors, while others say that it is very questionable, defective, and disappointing.

"...Bonus that it’s dual smoke and carbon monoxide detector .I would recommend this for a simple smoke/carbon monoxide detector." Read more

"...The living room filled with smoke . The detector did not go off. My old detector would’ve gone off. Would not recommend. Does not work...." Read more

"This is a good smoke detector . It does the job and I love that it is pretty small. The batteries it comes with are cheap though...." Read more

"These smoke and carbon monoxide detectors seem to be good quality - installation was simple and quick, and they appear to be good quality...." Read more

Customers have mixed opinions about the battery life of the gas smoke fire alarm. Some mention that it comes with a 10 year battery, and is easy to install. However, others say that the battery is awful, and the life is inconsistent.

"...detector/CO monoxide detector was really easy to install and lasts for some time ...." Read more

"...checking itself.... at least I hope it is...or the battery they came with is not fully charged ." Read more

"...I like thar they come with batteries and I received them quickly." Read more

"...So my three-pack is suddenly a two-pack. One also came with a dead battery ." Read more

Customers are mixed about the appearance of the gas smoke fire alarm. Some mention it looks good, has a nice clean color, and is modern. Others say it's poorly designed, feels cheap, and looks like a kids toy.

"...They are small and stylish , not big and bulky. Batteries included, nice touch!" Read more

"...They feel just a little cheap , but that probably comes along with the price so really can’t complain...." Read more

"...are until you actually need them but from the looks of them, they look great . It's the same size as a standard smoke alarm so it fits perfect!" Read more

"I loved the sleek look of this alarm. It was very easy to install onto the ceiling...." Read more

Customers are dissatisfied with the noise produced by the gas smoke fire alarm. They mention that it makes a weird noise, starts making low crackling noises continuously, and starts ringing. Some say that the static noise continues to get louder. Some customers also say that two of the three kept beeping continually. Overall, some customers feel that the fire alarm is not loud enough to be heard throughout the house.

"...So far they are working good, but once or twice a day, they will beep a quiet beep .... So I'm assuming that beep is the Detector checking itself......." Read more

"...how after a few months or so, some of the detectors started emitting this weird crackling noise ...." Read more

"...their job as I burnt some food on the stove and the detector started to beep very loudly , startling myself...." Read more

"One of my detectors had issues with the test button, it would not beep , but after opening it up and doing some fixing, the test button worked...." Read more

Customers are not satisfied with the brightness of the gas smoke fire alarm. They mention that the flashing green light is too bright and can be annoying in the dark of their bedroom. Some customers also report that the product emits a very bright light that wakes them up. They also mention that there is a random flash of white light that makes them think they are having a seizure. Overall, some customers feel that the intermittent green light flashing is distracting and vexing.

"...that indicates the unit is working is a bit bright, it flashes in the dark of your bedroom and this can be annoying...." Read more

"...Does not work. Glad I learned it this wayP.S. The blinking light was vexing . Couldn’t sleep...." Read more

"...light that is always on and flashing to tell you it's working is super bright and especially at night when you're trying to sleep...." Read more

"...The green light that flashes to tell you it is working is SUPER bright ...." Read more

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Article updated on May 15, 2024 at 9:52 AM PDT

Best Carbon Monoxide Detector for 2024

Protect your home from the presence of carbon monoxide, the "silent killer." Here are the best carbon monoxide detectors.

Our Experts

CNET’s expert staff reviews and rates dozens of new products and services each month, building on more than a quarter century of expertise.

Your home can slowly be filled with carbon monoxide without much warning . There is no color, odor or taste to CO, making it very difficult to find and giving it the nickname of "silent killer". This is where carbon monoxide detectors come in.

When humans breathe in carbon monoxide, it binds to the hemoglobin in their red blood cells, replacing and reducing the amount of oxygen that can be carried by the blood. This leads to a range of symptoms, from headaches and dizziness to confusion, nausea and even death.

Having a carbon monoxide detector in your home will help protect your household from this potentially deadly gas. The detector can alert you to the presence of dangerous levels of carbon monoxide and give you time to evacuate and, if necessary, seek medical attention.

To help you make the right decision, we gathered seven of the most popular carbon monoxide detectors, including some that double as smoke detectors and evaluated their ability to detect carbon monoxide at two hazardous concentration levels: 250 and 400 ppm (parts per million). Here are our picks.

Best carbon monoxide detector overall

First alert co615.

At an average retail price right around $35, the CO615 from First Alert is the perfect carbon monoxide detector if you're looking for handy features and decent performance at an affordable price.

Highlights include a digital display that shows real-time carbon monoxide concentration in ppm and battery level, a test/silence button for weekly testing and a peak carbon monoxide level button to show the highest carbon monoxide concentration detected. This is a plug-in model that is backed up by two AA batteries (Energizer E91 only). Just pick any outlet that's not controlled by a switch or dimmer, and that is at least 5 feet away from any fuel-burning appliance. Plug it in and you're ready to go. The unit can be hung in the wall with two screws and its cord extends at least 6 feet, giving you a little flexibility as far as where exactly you can install it in your home.

This unit ranked third in our quickness of response test. On average, it took a little more than 12 minutes to detect the presence of carbon monoxide at 250 ppm and just over 8 minutes to detect carbon monoxide at 400 ppm. The real-time carbon monoxide reading is pretty accurate, taking only two and a half minutes to catch up to the reading shown in our control device. The carbon monoxide reading on the detector went a little above what our control was showing. The discrepancy between the two readings remained below 7%.

Having a real-time display of the carbon monoxide concentration is incredibly useful. Most common carbon monoxide alarms are designed to go off after the carbon monoxide levels in an area have been above a certain threshold for a while .  Having immediate and accurate access to this information can help you take swift preventive action before the alarm has a chance to react.

Best carbon monoxide detector on a budget

First alert co400.

If all you need is a carbon monoxide detector that can reliably watch your back without leaving a hole in your pocket, then the First Alert CO400 is perfect for the task. Basic features include a single test/silence button and a very loud alarm. It doesn't come with a digital display or any smart features, but it makes up for what it lacks in fancy looks with performance and affordability. Typically available for $25 or less , the CO400 was the least expensive carbon monoxide detector we tested, and it was also the fastest at detecting carbon monoxide at both concentration levels. At 250 ppm, its alarm was set off after an average of 10 minutes, 46 seconds and at 400 ppm, it only took 7 minutes, 3 seconds. Those are excellent results, regardless of price.

With its low asking price, the CO400 would also be a particularly good pick for multistoried homes, where you should aim to have at least one detector on every floor. Plus, as a battery-powered model, it won't add to your energy bill and is immune if you have a power outage.

Best smoke and carbon monoxide combo detector

First alert onelink 1042136 (update: out of stock).

Some carbon monoxide detectors can find both carbon monoxide molecules and smoke particles. These are called "combo" or "two in one" units, doubling as smoke detectors. The First Alert Onelink 1042136 stood out in this category. This device got second place in our quickness of response test, detecting carbon monoxide at 250 ppm after only 11 minutes, 42 seconds and, similarly, carbon monoxide at 400 ppm after 8 minutes, 10 seconds.

Despite not having a digital display, the voice alarm will speak to you in English and clearly state the current carbon monoxide concentration. Depending on where you installed your device, it can also tell you the exact location of the emergency. For example, during testing, you could hear the device saying: "Evacuate, evacuate. There's carbon monoxide in the living room, 265 ppm." To my surprise, the control device reading for this round was 260 ppm. That amounts to an accuracy error of less than 2%, which is significantly better than anything else we tested.

Additionally, Onelink is a compelling option for those seeking smart functionality. It's compatible with Google, Apple HomeKit and Alexa. All you have to do is download the Onelink Home app and create a free account. Then, follow the instructions to set up a new device. From the app, you can test or silence your carbon monoxide alarm, interconnect other carbon monoxide detectors in your home and get emergency notifications to your smartphone.

All of that said, there are two caveats worth mentioning here. First is the cost. Often selling for more than $100 , the Onelink combo detector is an expensive option, particularly if you're shopping for more than one in something like a multistory home. On top of that, while it performed well in our carbon monoxide tests, it was less impressive when we compared it to other smoke detectors , taking over a minute to detect a controlled, slow-smoldering fire nearby. While not disqualifying, that was still almost twice as long as it took other combo detectors to react.

How we test carbon monoxide detectors

To put these detectors to the test, we took to the lab and built a test rig designed to measure each unit's response time to varying concentrations of carbon monoxide, specifically at 250 ppm and 400 ppm. Our goal was to determine each detector's respective effectiveness at detecting potentially hazardous levels of carbon monoxide. To declare our winners, we also took into account features that add to the overall user experience, performance and cost-efficiency of each unit.

For the 250 ppm concentration level, we try to simulate a situation where carbon monoxide has begun to build up to hazardous levels. We test twice at this concentration and average the results. At 400 ppm, we replicate a worst-case scenario, a potentially deadly situation, and give the units a pass or fail score. Spoiler alert: They will all save your life, which goes to show how important it is to have carbon monoxide detectors installed on every floor of your home.

Our custom-built carbon monoxide detector test station. It's one of the deadliest things we've ever put together in our product testing lab.

This is one of the most dangerous tests we've ever conducted. Carbon monoxide exposure is no joke. It's virtually undetectable and, well, quite deadly. We needed to create a safe way of testing carbon monoxide detectors without risking the health and safety of our laboratory staff. So, I made use of my rudimentary carpentry skills and built a carbon monoxide detector test station. Its components are:

Carbon monoxide detector chamber -- made using wood, plexiglass, silicon, tape and a bunch of finish nails.

Carbon monoxide tank with gas flow regulator -- cylinder tank containing CO at 2,500 ppm and balance air.

Testo 300 with carbon monoxide Ambient sensor -- our control device for this experiment.

Two portable carbon monoxide gas alarms .

A look at the interior of CNET's carbon monoxide detector test rig.

The chamber houses two carbon monoxide detectors, a) the CO Ambient sensor portion of our control device, the Testo 300, which is a combustion analyzer used by heating engineers who carry out installation and routine maintenance of industrial and residential heating systems, and b) the unit under test, or UUT, which takes the place of each carbon monoxide detector we tested for you. The chamber is sealed with foam but not air-tight, since we're not particularly interested in making a carbon monoxide bomb.

We use a portable carbon monoxide alarm on the gas regulator to keep a nose out for leaks.

We installed a gas flow regulator on our tank to avoid pressure spikes, followed by a gas line to feed our gas mixture into the chamber. Two additional portable carbon monoxide detectors are used. One near the valve, to ensure there are no leaks and another that must be worn by the person experimenting to make sure there is no carbon monoxide buildup in the test station area. On top of all that, our respirator suits and amply ventilated location ensure that we get a constant stream of fresh air at all times. This might all sound excessive, but it's always good laboratory practice to put safety first, especially when you're dealing with such a stealthy and prolific killer. 

We start by feeding our gas mixture to the chamber and closely monitoring the carbon monoxide concentration on the Testo. Once the concentration inside our chamber reaches at least 250 ppm or 400 ppm, we stop feeding the gas and start a timer. We want to assess how long the carbon monoxide detectors take to react to those conditions. As you may understand, we wanted to limit our exposure while making sure our results were repeatable.

Our results are summarized in the interactive graph below:

Other carbon monoxide detectors we've tested

Nest Protect smoke and carbon monoxide alarm : A very compelling option for those who don't mind spending a little more in exchange for a wide range of smart features including location-specific voice alarm, color-coded emergency notifications and smartphone app control for silencing and routine testing. It underperformed its competition in our quickness of response test, with a bottom-three result in the 250 ppm run and last place in the 400 ppm run. Fortunately, it did a better job at quick smoke detection and fire hazards during our most recent round of smoke detector tests .

Kidde KN-COPP-B-LPM battery-operated carbon monoxide alarm : Battery-powered (meaning monitoring won't stop in a power outage), digital display, test/reset and peak carbon monoxide buttons, visual cues for alarm and operational status. Great unit if you want an affordable device that is capable of monitoring real-time carbon monoxide levels as well as battery life. Not the fastest at detecting carbon monoxide (it ranked fourth). Carbon monoxide readouts on its screen are the least accurate of the bunch, at 15% error, which is by no means the end of the world. 

X-Sense combination smoke and carbon monoxide alarm : This combo unit comes equipped with a 10-year sealed lithium battery and a digital display that shows real-time carbon monoxide concentration, battery level and working status. Second-to-last place in our quickness of response test, detecting carbon monoxide at 250 ppm after 20 minutes. The carbon monoxide concentration monitor is accurate, with less than 5% error. Its LCD is smaller than those of other products in this category, which makes it a little hard to interpret the readouts if you're not close to the device. 

Kidde Plug-in KN-COB-DP2 carbon monoxide alarm : A plug-in unit, backed up by two AA batteries. Features a single LED indicator and a test/reset button. Very specific brand and model requirements for battery replacements. The unit does not come with a cord extension so its installation placement is limited to an electrical outlet. Last place in our quickness of response test.

Carbon monoxide detector FAQ

How do carbon monoxide detectors work.

Carbon monoxide detectors work by using sensors to detect the presence of carbon monoxide in the air. When carbon monoxide levels reach a certain threshold, the detector sounds an alarm to alert occupants of the building. There are different types of detectors available, but most use electrochemical sensors, metal oxide semiconductors or biomimetic sensors to detect carbon monoxide.

Where should carbon monoxide detectors be placed?

Carbon monoxide detectors should be placed on every level of the home and in every sleeping area. They should also be placed near sources of potential carbon monoxide, such as furnaces, water heaters, fireplaces and attached garages. Follow the manufacturer's instructions for the specific placement of your detector.

How often should carbon monoxide detectors be replaced?

Carbon monoxide detectors should be replaced every five to seven years, depending on the manufacturer's recommendations. Regular testing and maintenance are also important to ensure that the detector is functioning properly and providing adequate protection.

What should I do if my carbon monoxide detector goes off?

Never ignore carbon monoxide alarms .  If your carbon monoxide detectors go off, evacuate the building immediately and seek fresh air. Call the fire department or emergency services from a safe location and do not re-enter the building until it has been checked and declared safe.

The Importance of Traveling with a Portable Carbon Monoxide Detector

W hile the risk of carbon monoxide poisoning shouldn’t deter anyone from exploring the world, it’s important to protect yourself and your loved ones from this potential danger. Here’s what you need to know about the risks of carbon monoxide poisoning and why carrying a portable carbon monoxide detector is a smart move during your travels.

Deaths From Carbon Monoxide

There has been an unfortunate increase in accidental deaths due to carbon monoxide poisoning among travelers in recent years. A tragic incident occurred at a resort on Mexico’s Baja California peninsula just last month. Although such occurrences are not common, they are entirely preventable. Unfortunately, some countries lack regulations that require hotels to have functioning carbon monoxide detectors. In other cases, vacation rental platforms and hosts prioritize profits over safety. Until these issues are addressed, there may, unfortunately, continue to be more accidents in the future.

Carbon monoxide is an insidious threat as it is virtually impossible to detect without a functioning carbon monoxide detector. Malfunctioning furnaces, stoves, and water heaters can all lead to carbon monoxide leaks. Confined spaces like hotel rooms and rental units with inadequate ventilation are at an even higher risk. The best way to protect yourself from toxic levels of this gas is by having a working carbon monoxide detector that can alert you if you are in danger.

It’s important to seek medical treatment promptly if you start feeling unwell during your vacation. While it may be tempting to attribute symptoms to travel-induced stress or food poisoning, listening to your body and recognizing when something is amiss is crucial. Hotels and resorts often have nurses or medical professionals who can assess your condition and provide necessary guidance.

Absence of Carbon Monoxide Detectors in Accommodations

The absence of carbon monoxide detectors in accommodations is a concerning issue when traveling. Despite the potential dangers of carbon monoxide poisoning, many hotels, resorts, and vacation rentals neglect to install these life-saving devices. This poses a significant risk to travelers who may be unaware of the presence of this odorless and deadly gas.

Without a functioning detector, identifying carbon monoxide leaks from malfunctioning appliances or inadequate ventilation becomes nearly impossible. Travelers should prioritize their safety by carrying a portable carbon monoxide detector during their journeys.

Selecting the Right CO Detector

When it comes to portable carbon monoxide detectors, travelers have a range of options available. In the search for a suitable detector, you should seek a compact size that would not add unnecessary weight or take up much space in your bag, particularly when traveling with just a carry-on. You should also get a battery-operated detector to eliminate the need for power converters when using international outlets.