20 Best Carbon Monoxide Alarm [2025]

Are you looking for the best carbon monoxide alarm ? Based on expert reviews, we ranked them. We've listed our top-ranked picks, including the top-selling carbon monoxide alarm .

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# Preview Product
1 Kidde Carbon Monoxide Detector, Plug In Wall with AA Battery Backup, Test-Hush Button Kidde Carbon Monoxide Detector, Plug In Wall with AA Battery Backup, Test-Hush Button
2 Kidde Carbon Monoxide Detector, Battery Powered CO Alarm with LEDs, Test-Reset Button, Low Battery... Kidde Carbon Monoxide Detector, Battery Powered CO Alarm with LEDs, Test-Reset Button, Low...
3 Kidde Carbon Monoxide Detector, AA Battery Powered CO Alarm with LEDs, Test-Reset Button, Low... Kidde Carbon Monoxide Detector, AA Battery Powered CO Alarm with LEDs, Test-Reset Button, Low...
4 First Alert CO400FF Battery Powered Carbon Monoxide Alarm, Pack of 1, White First Alert CO400FF Battery Powered Carbon Monoxide Alarm, Pack of 1, White
5 Kidde Carbon Monoxide Detector, Plug In Wall with 9-Volt Battery Backup, Digital LED Display Kidde Carbon Monoxide Detector, Plug In Wall with 9-Volt Battery Backup, Digital LED Display
6 Kidde Smoke & Carbon Monoxide Detector, Battery Powered, Combination Smoke & CO Alarm, Voice Alert Kidde Smoke & Carbon Monoxide Detector, Battery Powered, Combination Smoke & CO Alarm, Voice Alert
7 Google Nest Protect - Smoke Alarm - Smoke Detector and Carbon Monoxide Detector - Battery Operated ,... Google Nest Protect - Smoke Alarm - Smoke Detector and Carbon Monoxide Detector - Battery Operated...
8 3 Pack Combination Photoelectric Smoke Alarm and Carbon Monoxide Detector Battery Operated with... 3 Pack Combination Photoelectric Smoke Alarm and Carbon Monoxide Detector Battery Operated with...
9 Kidde Nighthawk Carbon Monoxide Detector & Propane, Natural, & Explosive Gas Detector, AC-Plug-In... Kidde Nighthawk Carbon Monoxide Detector & Propane, Natural, & Explosive Gas Detector, AC-Plug-In...
10 Kidde Smoke & Carbon Monoxide Detector, Hardwired Interconnect, Combination Smoke & CO Alarm with... Kidde Smoke & Carbon Monoxide Detector, Hardwired Interconnect, Combination Smoke & CO Alarm with...
11 First Alert CO615 Dual-Power Plug-In Carbon Monoxide Detector with Battery Backup and Digital... First Alert CO615 Dual-Power Plug-In Carbon Monoxide Detector with Battery Backup and Digital...
12 First Alert CO605 Plug-In Carbon Monoxide Detector with Battery Backup , White First Alert CO605 Plug-In Carbon Monoxide Detector with Battery Backup , White
13 2 Pack Combination Photoelectric Smoke Alarm and Carbon Monoxide Detector Digital Display, Protect... 2 Pack Combination Photoelectric Smoke Alarm and Carbon Monoxide Detector Digital Display,...
14 X-Sense 10 Years Battery Wireless Interconnected Combination Smoke and Carbon Monoxide Detector... X-Sense 10 Years Battery Wireless Interconnected Combination Smoke and Carbon Monoxide Detector...
15 Kidde Smoke & Carbon Monoxide Detector, Hardwired, Interconnect Combination Smoke & CO Alarm with... Kidde Smoke & Carbon Monoxide Detector, Hardwired, Interconnect Combination Smoke & CO Alarm with...
16 First Alert BRK PRC710 Smoke and Carbon Monoxide Alarm with Built-In 10-Year Battery , White First Alert BRK PRC710 Smoke and Carbon Monoxide Alarm with Built-In 10-Year Battery , White
17 Kidde Kitchen Smoke Detector & Carbon Monoxide Detector Combo with Long-Life Lithium Battery Kidde Kitchen Smoke Detector & Carbon Monoxide Detector Combo with Long-Life Lithium Battery
18 2 Pack CO Detector, Carbon Monoxide Gas Detection, CO Alarm with LCD Digital Display, Not Included... 2 Pack CO Detector, Carbon Monoxide Gas Detection, CO Alarm with LCD Digital Display, Not...
19 First Alert Carbon Monoxide Detector Alarm|No Outlet Required with Digital Display and Peak Memory,... First Alert Carbon Monoxide Detector Alarm|No Outlet Required with Digital Display and Peak...
20 3 Pack 10 Year Battery Operated Smoke Detector and Carbon Monoxide Detector, Travel Portable... 3 Pack 10 Year Battery Operated Smoke Detector and Carbon Monoxide Detector, Travel Portable...
SaleBestseller No. 1
Kidde Carbon Monoxide Detector, Plug In Wall with AA Battery Backup, Test-Hush Button
  • Easy Installation - simply plug-in to a standard, 120V outlet in your home
  • 2-AA battery backup provides protection during a power outage
  • 85-decibel alarm announces when carbon monoxide is detected
  • Peak Level Memory records the last time carbon monoxide was detected or when the unit was last tested
  • Test-Hush Button makes testing the detector or silencing false alarms easy
SaleBestseller No. 2
Kidde Carbon Monoxide Detector, Battery Powered CO Alarm with LEDs, Test-Reset Button, Low Battery...
  • Electrochemical sensor technology detects CO gas
  • Easy installation, no wiring needed, detects during a power failure by operating on 2-AA batteries (included)
  • Conveniently designed & portable: simple to install on a wall of your home or place on a tabletop
  • Green LED indicates power to the carbon monoxide detector, while an 85-decibel alarm & a red LED indicates the presence of carbon monoxide
  • Event Memory records the last time carbon monoxide was detected or when the unit was last tested
SaleBestseller No. 3
Kidde Carbon Monoxide Detector, AA Battery Powered CO Alarm with LEDs, Test-Reset Button, Low...
  • Electrochemical sensor technology detects CO gas
  • Easy installation, no wiring needed, detects during a power failure by operating on 2-AA batteries (included)
  • Conveniently designed & portable: simple to install on a wall of your home or place on a tabletop
  • Green LED indicates power to the smoke detector, while an 85-decibel alarm & a red LED indicates the presence of carbon monoxide
  • Peak Level Memory records the last time carbon monoxide was detected or when the unit was last tested
SaleBestseller No. 4
First Alert CO400FF Battery Powered Carbon Monoxide Alarm, Pack of 1, White
  • Keep your family safe with this easy to use, battery operated carbon monoxide alarm; Battery powered alarms provide continuous monitoring of CO...
  • Features an advanced electrochemical carbon monoxide sensor that accurately detects carbon monoxide levels, no matter where the detector is placed in...
  • A loud 85 decibel alarm sounds when CO levels reach dangerous levels
  • To ensure complete protection make sure to place one on each level of your home and in each bedroom
  • 5-year limited warranty; Equipped with end of life signal chirp, so you know when it’s time to replace the unit for safety
SaleBestseller No. 5
Kidde Carbon Monoxide Detector, Plug In Wall with 9-Volt Battery Backup, Digital LED Display
  • Easy Installation - simply plug-in to a standard, 120V outlet in your home
  • 9-volt battery backup provides protection during a power outage
  • Digital LED display shows the level of carbon monoxide the CO alarm is sensing
  • 85-decibel alarm announces when carbon monoxide is detected
  • Peak Level Memory records the last time carbon monoxide was detected or when the unit was last tested
SaleBestseller No. 6
Kidde Smoke & Carbon Monoxide Detector, Battery Powered, Combination Smoke & CO Alarm, Voice Alert
  • Fire and CO detector in 1 unit with alert modes, LED lights, and voice alarm, that states, "Fire. Fire.", "Warning. Carbon Monoxide.", or "Low...
  • Ionization sensor technology - smoke detector detects invisible fire particles, 85 decibel alarm alerts of fire
  • Protects during a power failure - combo smoke and CO alarm operates on 2-AA batteries
  • Test-Hush Feature - silences the unit for approximately 8 minutes; tamper-resistant technology deters removal of the unit from the wall or ceiling
  • UL Certified, 10-year limited warranty
Bestseller No. 7
Google Nest Protect - Smoke Alarm - Smoke Detector and Carbon Monoxide Detector - Battery Operated ,...
  • Smoke detector and carbon monoxide detector that speaks up in a friendly voice to give you an early warning when there's smoke or CO in your home
  • Split Spectrum Sensor looks for both fast burning and smoldering, and tells you where the danger is
  • Get phone alerts so you know something's wrong even when you're away from home[1]
  • CO detector looks out for carbon monoxide and tells you where it's located
  • With App Silence you can silence the smoke alarm with your phone in the Nest app when there's only a little smoke
Bestseller No. 8
3 Pack Combination Photoelectric Smoke Alarm and Carbon Monoxide Detector Battery Operated with...
  • 2-in-1 Accurate, Reliable & Highly Sensitive Alarm: Equipped with both photoelectric smoke sensor and electrochemical CO sensor that work...
  • LCD Display: Clearly indicates real-time carbon monoxide (CO) concentration in the surrounding air, as well as the remaining battery life and working...
  • Test and Silence Button: Tests the unit for proper operation and resets the smoke and carbon monoxide alarm, Alarm Volume: Loud > 85dB(A) at 1 meters....
  • Easy Install and Use: The alarm can easily install with mounting bracket. No hardwired anymore, very convenient to install at home or bedroom - wall...
  • Safety and 5 year Warranty: Low battery signal alarm and "end of life"warning ensures the detector can work normal. Environment friendly, without...
SaleBestseller No. 9
Kidde Nighthawk Carbon Monoxide Detector & Propane, Natural, & Explosive Gas Detector, AC-Plug-In...
  • Easy to install CO and explosive gas alarm with three convenient mounting options including AC wall outlet, plugin six foot power cord, or table top
  • Carbon Monoxide (CO) alarms four quick beeps, followed by five seconds of silence, followed by four quick beeps. Displays CO concentration
  • Gas alarms one second of alarm on, one second of alarm off, repeating with “GAS” shown in display
  • Loud pulsing alarm that will sound to alert you to a potential problem
  • Low battery warning feature indicates when the battery needs replacement
Bestseller No. 10
Kidde Smoke & Carbon Monoxide Detector, Hardwired Interconnect, Combination Smoke & CO Alarm with...
  • Smoke detector carbon monoxide detector combo – sounds loud 85 decibel alarm with voice alerts that announce "Fire. Fire." or "Warning. Carbon...
  • Hardwired with backup battery - combo smoke and carbon monoxide detector is hardwired into a 120V power source with 9V battery backup
  • Easy installation – battery door is on the front for quick replacement
  • Photoelectric smoke detector senses visible fire particles and electrochemical CO detector provides accurate readings
  • UL Certified, 10-year limited warranty
Bestseller No. 11
First Alert CO615 Dual-Power Plug-In Carbon Monoxide Detector with Battery Backup and Digital...
  • Keep your family safe with this digital display, plug in carbon monoxide alarm; It works with any standard outlet and also has a battery backup for...
  • Features an advanced electrochemical carbon monoxide sensor; Peak level feature displays the highest concentration of carbon monoxide measured
  • A loud 85 decibel alarm sounds when Carbon Monoxide levels reach dangerous levels
  • To ensure complete protection make sure to place one on each level of your home and in each bedroom
  • 7 year limited warranty; Equipped with end of life signal chirp, so you know when it’s time to replace the unit for safety
SaleBestseller No. 12
First Alert CO605 Plug-In Carbon Monoxide Detector with Battery Backup , White
  • Keep your family safe with this easy to use plug in carbon monoxide alarm; It works with any standard outlet and also has a battery backup for...
  • Features an advanced electrochemical carbon monoxide sensor that accurately detects carbon monoxide levels, no matter where the detector is placed in...
  • Simple to use, with a single test/silence button; a loud 85 decibel alarm sounds when Carbon Monoxide levels reach dangerous levels. Low battery...
  • To ensure complete protection make sure to place one on each level of your home and in each bedroom
  • 7 year limited warranty; Equipped with end of life signal chirp, so you know when it’s time to replace the unit for safety
Bestseller No. 13
2 Pack Combination Photoelectric Smoke Alarm and Carbon Monoxide Detector Digital Display, Protect...
  • 2-in-1 Accurate, Reliable & Highly Sensitive Alarm: Equipped with both photoelectric smoke sensor and electrochemical CO sensor that work...
  • LCD Display: Clearly indicates real-time carbon monoxide (CO) concentration in the surrounding air, as well as the remaining battery life and working...
  • Test/Silence Button: Tests the unit for proper operation and resets the smoke and carbon monoxide alarm, Alarm Volume: Loud > 85dB(A) at 1 meters....
  • Easy Install and Use: The alarm can easily install with mounting bracket. No hardwired anymore, very convenient to install at home or bedroom - wall...
  • Safety and 5 year Warranty: Low battery signal alarm and "end of life"warning ensures the detector can work normal. Environment friendly, without...
Bestseller No. 14
X-Sense 10 Years Battery Wireless Interconnected Combination Smoke and Carbon Monoxide Detector...
  • ENTIRE HOUSE NOTIFICATION: If one alarm goes off, all other interlinked alarms will follow suit, alerting you to danger regardless of where you are
  • WIDE COVERAGE FOR FULL HOME PROTECTION: Interlinks with up to 24 X-Sense smoke, CO, or combination alarms in a network, ensuring your entire house is...
  • 2-IN-1 PROTECTION: Built with a photoelectric smoke sensor and an electrochemical CO sensor to protect your home from 2 potentially deadly threats
  • BUILT-IN 10-YEAR BATTERY: Uninterrupted 24/7 monitoring with a 10-year sealed lithium battery, freeing you from frequent battery replacement
  • WORRY-FREE AFTER-SALES SERVICES: 60-day money-back guarantee, 5-year warranty, and lifetime customer support; feel free to contact us if you have any...
Bestseller No. 15
Kidde Smoke & Carbon Monoxide Detector, Hardwired, Interconnect Combination Smoke & CO Alarm with...
  • Fire & CO Detector in 1 unit with alert modes, LED lights, & voice alarm, that states, "Fire! Fire!", "Warning! Carbon Monoxide!", or "Low Battery!"
  • Ionization sensing technology - hardwired smoke detector detects invisible fire particles, 85 decibel alarm alerts of fire
  • Protects during a power failure - combo smoke and CO detector operates on a 120VAC power source with 2-AA battery backup
  • Test-Hush Feature - silences the unit for approximately 9 minutes; tamper-resistant technology deters removal of the unit from the wall or ceiling
  • UL Certified, 10-year limited warranty
SaleBestseller No. 16
First Alert BRK PRC710 Smoke and Carbon Monoxide Alarm with Built-In 10-Year Battery , White
  • Complies with all current 10 year legislation in U. S. states/cities where required
  • Features electrochemical Carbon Monoxide sensing technology and photoelectric smoke sensor optimized to detect larger smoke particles produced by...
  • A loud 85 decibel alarm sounds when Carbon Monoxide, and Smoke levels begin to rise
  • Features a sleek, low profile design to blend more fully into the wall and out of sight
  • 10-year limited ; equipped with end-of-life signal chirp, so you know when it’s time to replace the unit for your safety (the date printed on the...
SaleBestseller No. 17
Kidde Kitchen Smoke Detector & Carbon Monoxide Detector Combo with Long-Life Lithium Battery
  • Smoke and carbon monoxide detector in one unit - saves time, money, and space
  • No battery replacement needed - operates on a long-life lithium battery that lasts for approximately a decade, the entire life of this smoke & carbon...
  • Photoelectric & electrochemical sensing technology work together to reduce false alarms from things like routine cooking - perfect for the kitchen
  • Easy to install - automatically activates when attached to mounting bracket
  • Test & Hush button - quickly silence false alarms and easily test the unit to make sure the carbon monoxide smoke detector combo is operating
Bestseller No. 18
2 Pack CO Detector, Carbon Monoxide Gas Detection, CO Alarm with LCD Digital Display, Not Included...
  • Very easy to install at home or bedroom. Precise electro-optical sensor, high consistency and stability, move, or in the same place for that. Loud...
  • The normal working state is that the green light flashes every 30 seconds.The blue backlit LCD display does not light up in standby mode (it will...
  • The normal working state is that the green light flashes every 30 seconds.The blue backlit LCD display does not light up in standby mode (it will...
Bestseller No. 19
First Alert Carbon Monoxide Detector Alarm|No Outlet Required with Digital Display and Peak Memory,...
  • Keep your family safe with this easy to use digital display, battery operated carbon monoxide alarm; battery powered alarms provide continuous...
  • Features an advanced electrochemical carbon monoxide sensor; Peak Level feature displays the highest concentration of carbon monoxide measured
  • A loud 85 decibel alarm sounds when Carbon Monoxide levels reach dangerous levels
  • To ensure complete protection make sure to place one on each level of your home and in each bedroom
  • 7 year limited warranty; equipped with end of life signal chirp, so you know when it’s time to replace the unit for safety
Bestseller No. 20
3 Pack 10 Year Battery Operated Smoke Detector and Carbon Monoxide Detector, Travel Portable...
  • Combo Smoke and Co Detecor: Features electrochemical Carbon Monoxide sensing technology and photoelectric smoke sensor optimized to detect larger...
  • 10 Year Battery Operated: This combination smoke detector and carbon monoxide detector alarm provides 10 years of continuous power with a built-in...
  • Test/Slience Button: Tests the unit for proper operation and resets the carbon monoxide alarm,Alarm
  • LOW BATTERY SIGNAL: Low battery voltage signal and end of life warning ensures the co detector can work normal. Environment friendly, without smell,...
  • A loud 85-decibel alarm sounds when Carbon Monoxide, and Smoke levels begin to rise,Easy to Install and Use: The alarm can easily install with...

Having trouble finding a great carbon monoxide alarm ?

This problem is well understood by us because we have gone through the entire carbon monoxide alarm research process ourselves, which is why we have put together a comprehensive list of the best carbon monoxide alarm s available in the market today.

After hours of searching and using all the models on the market, we have found the best carbon monoxide alarm for 2023. See our ranking below!

How Do You Buy The Best Carbon Monoxide Alarm ?

Do you get stressed out thinking about shopping for a great carbon monoxide alarm ? Do doubts keep creeping into your mind?

We understand, because we’ve already gone through the whole process of researching carbon monoxide alarm , which is why we have assembled a comprehensive list of the greatest carbon monoxide alarm available in the current market. We’ve also come up with a list of questions that you probably have yourself.

John Harvards has done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for carbon monoxide alarm that you consider buying. Your questions might include the following:

  • Is it worth buying an carbon monoxide alarm ?
  • What benefits are there with buying an carbon monoxide alarm ?
  • What factors deserve consideration when shopping for an effective carbon monoxide alarm ?
  • Why is it crucial to invest in any carbon monoxide alarm , much less the best one?
  • Which carbon monoxide alarm are good in the current market?
  • Where can you find information like this about carbon monoxide alarm ?

We’re convinced that you likely have far more questions than just these regarding carbon monoxide alarm , and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for carbon monoxide alarm , rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible carbon monoxide alarm . Make sure that you are only using trustworthy and credible websites and sources.

John Harvards provides an carbon monoxide alarm buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information.

How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available carbon monoxide alarm currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

  1. Brand Value: Every brand of carbon monoxide alarm has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an carbon monoxide alarm ?
  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your carbon monoxide alarm .
  5. Customer Ratings: Number ratings grade carbon monoxide alarm objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their carbon monoxide alarm .
  7. Product Quality: You don’t always get what you pay for with an carbon monoxide alarm , sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an carbon monoxide alarm is should be an indication of how long it will work out for you.

John Harvards always remembers that maintaining carbon monoxide alarm information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

If you think that anything we present here regarding carbon monoxide alarm is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly!

FAQ:

Q: What you should know about carbon monoxide alarms?

A: – The battery might be loose, dying or installed incorrectly. Inspect it and check the use-by date. – The alarm sensors may be dirty. … – The unit may be installed near an open window or air vent. … – The humidity in the area near the alarm may be too high. … – Your detector may be too close to cooking equipment. … – Your detector may need to be replaced. …

Q: How carbon monoxide alarms can save your life?

A: The First Step In Carbon Monoxide Safety. Installing a quality carbon detector and alarm is the first thing you need to do to achieve a CO-safe home. Common Causes Of Indoor Carbon Monoxide Build-Up. … A Common Sign Of A CO Build-Up Or Leak. … Symptoms Of Carbon Monoxide Exposure. … Steps To Take If You Suspect Carbon Monoxide Exposure. … Conclusion. …

Q: How to respond to a Carbon Monoxide alarm?

A: Run a car or truck inside a garage attached to your house,even if you leave the door open. Burn anything in a stove or fireplace that isn’t vented. Heat your house with a gas oven.

Q: What to do if your Carbon Monoxide alarm goes off?

A: Turn off appliances,or other sources of combustion at once. Immediately get fresh air into the premises by opening doors and windows. Call a qualified technician and have the problem fixed before restarting appliances.

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