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5 Best Carbon Monoxide Detectors of 2025

Last Updated - 2025/09/17

1
Best Choice
25% Off

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

LSENLTY
25% Off

LSENLTY Upgraded Carbon Monoxide Detector Plug in Wall, Air Quality Detector with HD Screen&Indicator Visual&Audible Alarm, 3-in-1 Air Quality Monitor(CO Gas Meter, Temp and Humidity) for RV Camping

LSENLTY

CA$59.99

CA$79.99
(25% Off)

More Details
Main highlights
- 【Intimate Brightness Design】When you feel that keeping the high-definition screen on is very power-consuming, you can choose to press the "Brightness" button to adjust the brightness condition. When you choose to turn off the screen brightness, the product will continue to monitor and the indicator light will remind you every 30 seconds to inform you that the product is under normal monitoring.
- 【High-precision Comprehensive Detector】 The product is equipped with a precision CO sensor, which refreshes every 2 seconds and can quickly detect the surrounding CO value. The detection range is 0-999PPM, and the accuracy is ±5%. It can also be used as an indoor thermometer with a temperature range of -10℃ ~ 50℃ and an accuracy ±3%; it can also be used as a hygrometer with a humidity range of 5% ~ 95%RH and an accuracy ±5% RH.
- 【Advanced Electrochemical Sensor】When exposed to carbon monoxide it generates an electric current immediately, meaning it responds faster and more accurately than traditional detector, and is less susceptible to being affected by other gases. Please note that when there is no carbon monoxide gas in the air, it is normal for the product to display a reading of 000PPM.
- 【A Comprehensive Air Detector Plug in Design for Home and Travel】Carbon monoxide is harmful. When the carbon monoxide in the air exceeds the standard, it will cause harm to the human body and endanger life safety. This plug-in Comprehensive Air Detector is compatible with 110V to 220V AC power outlets. Fits all Canada standard AC outlets in bedrooms, RVs, kitchens, living rooms, basements, hotel rooms, and more.
- 【2.1-inch High-definition Display】 Not only can the carbon monoxide concentration value be intuitively viewed on the 2.1-inch high-definition display, but also the temperature and humidity conditions of daily concern can be clearly seen.
CA$59.99
CA$79.99 (25% Off)
2
Best Value
23% Off

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Kidde
23% Off

Kidde C3010D Worry-Free Carbon Monoxide Alarm with Digital Display and 10 Year Sealed Battery

Kidde

CA$46.78

CA$61.49
(23% Off)

More Details
Main highlights
- Test/Reset -Tests CO alarm circuit operation and allows you to immediately silence the alarm.
- Peak Level Memory - Displays the highest CO concentration measured since the last reset.
- LED Lights - Green for normal operation, Red for alarm, Amber for Error.
- Digital Display - Displays the level of carbon monoxide the unit is sensing. The unit updates this reading every 15 seconds.
- 10-Year Sealed-in Lithium Batteries -Unit will continue to operate for 10 years. Alerts user to replace unit after 10 years of operation.
CA$46.78
CA$61.49 (23% Off)
3

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

First Alert

First Alert CO605A Carbon Monoxide Plug-In Alarm with Battery Backup

First Alert

CA$31.28

More Details
Main highlights
- Plug & protect, alarm plugs into any standard 120v ac outlet with no additional mounting
- Mute button silences unnecessary alarms. It also tests the alarm's function with same button
- Ez access battery door, front-open compartment allows easy battery change without dismounting alarm
- Electrochemical co sensorthe first alert carbon monoxide plug-in alarm
CA$31.28
4

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Ledronco

Carbon Monoxide Detector,CO Alarm Detector with Digital Display and Sound Alarm for Home 2pcs

Ledronco

CA$38.99

More Details
Main highlights
- 4：Power Supply: (DC3V) 2AA size batteries.(Not included) Sensor Type：Electrochemical Gas Detection Type：Carbon Monoxide Material: ABS
- 3： High Quality CO Alarm, UL2034 Certified Carbon Monoxide detector equipped with high accuracy and reliable long-life electrochemical CO sensor to detect CO gas leak quickly
- 2： Alarm Standard: the alert time depend the level of carbon monoxide concentration. 50ppm, alert within 60 to 90 minutes; 100ppm, alert within 10 to 40 minutes; 300ppm, alert within 3 minutes.
- 1：Light and Sound Alarm Warning: When a dangerous level of carbon monoxide is detected the red LED will flash and the alarm pattern will sound 85-decibel alarm to protect your family's life and property safety from CO detector.
CA$38.99
5

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Kidde

Kidde 900-0263CO-CA Plug-in Carbon Monoxide Alarm (KN-COB-DP2CA), White, 1 Units

Kidde

CA$35.99

More Details
Main highlights
- Test / Reset Button – Tests the unit for proper operation. Resets the carbon monoxide alarm.
- Tamper Resist Feature – If activated, unit goes into constant alarm mode if it has been unplugged or has come loose from the outlet.
- Low Battery Hush – Silences low battery chirp warning for up to twelve hours in order to maintain protection without having to replace the batteries at an inconvenient time. 2 AA Battery Backup – Provides continuous protection in case of a power failure.
- End of Life Notification – Ten (10) years after unit is first powered, this alarm will chirp two times every 30 seconds to indicate it is time to replace the alarm.
- AC Plug-in Operated – Easy to install – just plug into a non-switched AC wall outlet.
CA$35.99

5 Best Carbon Monoxide Detectors of 2025

LSENLTY Upgraded Carbon Monoxide Detector Plug in Wall, Air Quality Detector with HD Screen&Indicator Visual&Audible Alarm, 3-in-1 Air Quality Monitor(CO Gas Meter, Temp and Humidity) for RV Camping

Kidde C3010D Worry-Free Carbon Monoxide Alarm with Digital Display and 10 Year Sealed Battery

First Alert CO605A Carbon Monoxide Plug-In Alarm with Battery Backup

Carbon Monoxide Detector,CO Alarm Detector with Digital Display and Sound Alarm for Home 2pcs

Kidde 900-0263CO-CA Plug-in Carbon Monoxide Alarm (KN-COB-DP2CA), White, 1 Units

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