10 Best carbon monoxide testers of 2025

Save up to 35% off

Best Choice

1

IQYEF

4-in-1 Carbon Monoxide Detectors, Natural Gas Leak Detector & Carbon Monoxide Detectors Plug-in & Battery Backup, HD Digital Display for CO, Gas, Temp, Humidity - Home, RV, Apartment Safety
9.9

Exceptional

Our Rating
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Value for Money

2

Klein Tools
Klein Tools ET110 CO Meter, Carbon Monoxide Tester and Detector with Exposure Limit Alarm, 4 x AAA Batteries and Carry Pouch Included

10% Off
Main highlights

Accurate CO Measurement
Detects carbon monoxide levels with precision, featuring a clear backlit display.

Ideal for Portable Use
Perfect for safety checks in various environments, including homes and parking garages.

Praised Dual Alarm System
Users appreciate the dual alarm system for low and high CO levels.
Key specs
- power source:Battery Powered
- alarm:Visual
- dimensions:1.46D x 2.16W x 7.74H
- color:Orange
- sensor:N/A
9.8

Exceptional

Our Rating

9.3
clearly written

8.9
Simple to use

8.2
Precision
3

TOPTES

TOPTES CT-580 Portable Carbon Monoxide Detector, Rechargeable CO Detector with Vibration, Visual & Audible Alarms, 0-1000PPM, TFT Color Display for Home, Camping, Travel, Industrial & Professional Use

15% Off
9.7

Exceptional

Our Rating
4

TOPTES
TopTes CT-300 Portable Carbon Monoxide Detector, CO Detector with Audible & Visual Alarm, 0-5000PPM, CO Alarm, Backlit LCD Screen, for Home, Car, Camping& Travel (Includes Battery x3) - Orange
Main highlights

Swift & Accurate Detection
Detects CO levels from 0-5000 ppm with precision, ensuring timely action against CO poisoning.

Versatile Usage
Ideal for home, car, camping, and travel, offering peace of mind in various environments.

Highly Praised Alarm System
Customers appreciate the effective visual and audible alarms for immediate CO detection.
Key specs
- power source:Battery Powered
- alarm:Visual & Audible Alarm
- dimensions:2.64 x 1.38 x 6.3 inches
- color:Orange
- sensor:Electrochemical sensor
9.6

Exceptional

Our Rating

9.1
Simple to use

8.9
clearly written

8.2
Precision
5

Lunarlipes
Lunarlipes Carbon Monoxide Detectors, Portable CO Detector with Temperature Sensor ＆ LCD Backlight Screen, Handheld Carbon Monoxide Meter Tester 0-1000PPM Range, Indoor/Oudoor (Includes Battery x3)
Main highlights

Key Features
Accurate electrochemical sensor, customizable alarm value, 4 test modes, portable design with clip, and power-saving automatic shutdown feature.

Ideal Use Cases
Perfect for homes, offices, industries, and vehicles, ensuring safety from CO gas in various environments indoors and outdoors.

Customer Reviews
Highly praised for its accuracy, ease of use, and the reliability of the alarm system in detecting dangerous CO levels.
Key specs
- power source:Battery Powered
- alarm:Audible, Visual
- dimensions:1.97D x 1.38W x 5.31H
- color:Yellow
- sensor:Electrochemical
9.5

Excellent

Our Rating

8.4
worth the money

8.2
Simple to use

8.2
clearly written
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6

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

35% 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
7

PUTECCH

Carbon Monoxide Detectors, Portable CO Detector Battery Powered, Handheld Carbon Monoxide Monitor Alarm Detector with LCD Display for Home/Outdoor/Travel (Batteries Included)
9.2

Excellent

Our Rating

9.9
Precision

9.9
Simple to use

9.7
Luminosity
8

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

33% 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.
9.0

Excellent

Our Rating

9.9
Easy installation

9.7
worth the money

9.7
Simple to use
9

SDI

Sdi Carbon Monoxide Detector Tester, 6 In H
8.8

Very Good

Our Rating
10

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
- dimensions:4.25 x 4.21 x 1.93 inches
- color:N/A
- sensor:Electrochemical sensor
8.5

Good

Our Rating