10 Best carbon monoxide detectors of 2025

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1

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Kidde
Kidde Carbon Monoxide Detector, Propane, Natural, Methane, & Explosive Gas Alarm, Plug-In Wall with 9-Volt Battery Backup, Digital LED Display
Main highlights

Easy Installation with Battery Backup
Simply plug into a 120V outlet; 9V battery ensures operation during power outages.

Ideal for Gas and CO Monitoring
Perfect for homes with natural gas, propane, or potential CO leaks.

Highly Rated Audible Alarm
Customers praise the loud 85-decibel alarm for effective alerting.
9.6

Exceptional

Our Rating

9.7
Noise level

9.5
Easy installation

9.5
clearly written
How do we rank?

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Careful review Our team ensures quality, value, and fit based on real user feedback

Trusted insights AI and human analysis guide your decisions, reflecting real user priorities
Real users impact

Thousands of users trust our site daily

Based on millions of stores and reviews

Shoppers influence our rankings
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Value for Money

2

Langkou

Portable Carbon Monoxide Detectors for Travel,4-in-1 Indoor Air Quality Monitor, CO Detector Monitor Alarm with LCD Display Sound 120dB Warning, Carbon Monoxide with Temperature & Humidity for Home
9.5

Excellent

Our Rating
3

Kidde
Kidde Carbon Monoxide Detector, Plug In Wall with AA Battery Backup, Test-Hush Button

47% Off
Main highlights

Easy Installation and Battery Backup
Simply plug into a 120V outlet; includes 2-AA battery backup.

Ideal for Homes with Gas Appliances
Perfect for homes with gas stoves and furnaces.

Highly Praised Loud Alarm
85-decibel alarm effectively alerts even heavy sleepers.
9.3

Excellent

Our Rating

9.7
Easy installation

9.5
worth the money

9.5
Simple to use
4

Kidde
Kidde Carbon Monoxide Detector, Battery Powered CO Alarm with LEDs, Test-Reset Button, Low Battery Indicator, Portable

24% Off
Main highlights

Battery Powered Convenience
Operates on 2-AA batteries, includes Test-Hush button for easy testing and silencing.

Ideal for Multi-Level Homes
Perfect for bedrooms and living areas, especially with wood-burning stoves.

Highly Rated Alarm Performance
Praised for its loud, effective alarm and reliable detection.
9.1

Excellent

Our Rating

9.9
Easy installation

9.7
worth the money

9.7
Simple to use
5

First Alert
First Alert CO400 Carbon Monoxide (CO) Detector, Battery Operated Alarm, 1-Pack
Main highlights

Continuous CO Monitoring
Battery-operated, providing uninterrupted monitoring even during power failures.

Ideal for Home Safety
Perfect for bedrooms and each level of your home.

Highly Praised Alarm
Customers appreciate the loud, effective 85-decibel alert.
9.0

Excellent

Our Rating

9.3
Easy installation

9.3
clearly written

9.1
Precision
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6

First Alert
First Alert Carbon Monoxide Detector, Plug-In Alarm with Battery Backup, CO605, White, 1-Pack

40% Off
Main highlights

Easy Installation with Backup Power
Plug-in design with battery backup ensures continuous CO monitoring.

Ideal for Home Safety
Perfect for multi-level homes and RVs, detects CO effectively.

Highly Rated for Reliability
Customers praise its reliable CO detection and easy setup.
8.8

Very Good

Our Rating

9.7
Easy installation

9.5
Simple to use

9.5
clearly written
7

SHYEEH
Carbon Monoxide Detectors, CO Detector Battery Powered, Carbon Monoxide Alarm with Sensitive CO Sensor, LCD Display and Sound Warning for Home, Bedroom, Kitchen
Main highlights

Advanced Electrochemical Sensor
Detects dangerous CO levels accurately and quickly with UL2034 compliance.

Ideal for Older Homes
Perfect for monitoring CO levels in older homes, especially during winter.

Real-Time LCD Display
Praised for its clear CO level readings and ease of use.
Key specs
- power source:Battery Powered
- alarm:85dB to 215-430ft
- sensor:Electrochemical sensor
- battery:3 AA batteries required
- dimensions:4.25 x 4.21 x 1.93 inches
8.5

Good

Our Rating
8

TALLPOWER

TALLPOWER Carbon Monoxide Detector,CO Gas Monitor Alarm,CO Sensor with LCD Digital Display and Sound Warning,CO Alarm with Sensitive CO Sensor,Battery Powered,for Home,Bedroom,Warehouse (1 Pack)
8.3

Good

Our Rating
9

Kidde
Kidde Carbon Monoxide Detector, AA Battery Powered CO Alarm with LEDs, Test-Reset Button, Low Battery Indicator, Portable
Main highlights

Battery Operated Convenience
Operates on 3 AA batteries, ensuring functionality during power failures.

Ideal for Home and Travel
Perfect for home use, garages, and portable enough for travel.

User-Friendly Design
Highly praised for easy installation and portability.
8.2

Good

Our Rating

9.9
Simple to use

9.7
Easy installation

9.7
clearly written
10

Pumwry

3 Pack Carbon Monoxide detectors,co Detector,Carbon Monoxide Alarm,co2 Detector Battery Powered with LCD Display,Carbon Monoxide Detector,UL2034 Standards,for Home
8.1

Good

Our Rating

9.9
Easy installation

9.9
Precision

9.9
clearly written

10 Best carbon monoxide detectors of 2025

1

Kidde Carbon Monoxide Detector, Propane, Natural, Methane, & Explosive Gas Alarm, Plug-In Wall with 9-Volt Battery Backup, Digital LED Display

9.7

9.5

9.5

How do we rank?

How do we rank?

Analyzing top stores

2

Portable Carbon Monoxide Detectors for Travel,4-in-1 Indoor Air Quality Monitor, CO Detector Monitor Alarm with LCD Display Sound 120dB Warning, Carbon Monoxide with Temperature & Humidity for Home

3

Kidde Carbon Monoxide Detector, Plug In Wall with AA Battery Backup, Test-Hush Button

9.7

9.5

9.5

4

Kidde Carbon Monoxide Detector, Battery Powered CO Alarm with LEDs, Test-Reset Button, Low Battery Indicator, Portable

9.9

9.7

9.7

5

First Alert CO400 Carbon Monoxide (CO) Detector, Battery Operated Alarm, 1-Pack

9.3

9.3

9.1

6

First Alert Carbon Monoxide Detector, Plug-In Alarm with Battery Backup, CO605, White, 1-Pack

9.7

9.5

9.5

7

Carbon Monoxide Detectors, CO Detector Battery Powered, Carbon Monoxide Alarm with Sensitive CO Sensor, LCD Display and Sound Warning for Home, Bedroom, Kitchen

8

TALLPOWER Carbon Monoxide Detector,CO Gas Monitor Alarm,CO Sensor with LCD Digital Display and Sound Warning,CO Alarm with Sensitive CO Sensor,Battery Powered,for Home,Bedroom,Warehouse (1 Pack)

9

Kidde Carbon Monoxide Detector, AA Battery Powered CO Alarm with LEDs, Test-Reset Button, Low Battery Indicator, Portable

9.9

9.7

9.7

10

3 Pack Carbon Monoxide detectors,co Detector,Carbon Monoxide Alarm,co2 Detector Battery Powered with LCD Display,Carbon Monoxide Detector,UL2034 Standards,for Home

9.9

9.9

9.9

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