10 Best carbon monoxide alarm in Canada

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Last Updated - 2026/09/09

Best Choice

01
Kidde

Kidde 21026350 Plug in Carbon Monoxide Alarm with Sealed Lithium Battery Back Up
Main highlights

Sealed Lithium Battery Back Up & Digital Display
Offers Protection During Power Outages, Prevents Unwarranted Removal Of The Battery, & Eliminates The Need For Annual Battery Replacement
Easy To Install, Provides Reliable Protection Against The Dangers Of Carbon Monoxide
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9.9

Exceptional

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02
Kidde

Smoke + Carbon Monoxide Combo Alarm with Voice Alerts and 10-Year Lithium Battery
Main highlights

Worry-Free 10-Year Battery – No battery changes for 10 years. Avoids inconvenient battery replacements over the life of the device.
Voice Alerts – Crystal-clear voice alerts in English and French tell you exactly why your alarm is sounding so you can react quickly.
Simple Installation – Easy install with included twist-and-click mounting bracket. End-of-life Notifications – This alarm beeps to remind you it’s time to replace it 10 years after it is powered. End-of-life Notifications – No low battery chirps! This alarm beeps to remind you it’s time to replace it 10 years after it is powered.
Self-testing Alarms – For added assurance, internal components ensure alarm is always operating as expected.
Double the Detection – Alerts you to both smoke & carbon monoxide (CO) using a single, cost-effective device.
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9.8

Exceptional

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03
First Alert

First Alert CO400A Battery Powered Carbon Monoxide Alarm

9.7 Easy installation

9.7 Simple to use

9.3 worth the money
Main highlights

SAME AS CO400A ASIN: B004Y75ZS2
Mute button, mutes unnecessary alarms. Also tests alarm function with same button
Low battery Signal mute, quiets low battery Signal for up to 8 hours
End of life timer, alarm chirps when it is time to replace it
Electrochemical sensor, most accurate technology available for detecting carbon monoxide* *compared to other common sensing technologies
Care: Vacuum the CO Alarm cover once a month, using the soft brush attachment. Never use water, cleaners, or solvents, since these may damage the unit. Test the CO Alarm again after vacuuming.
Battery operated, 9V battery included
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9.7

Exceptional

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Value for Money

04
First Alert

First Alert CO615A Carbon Monoxide Plug-In Alarm with Battery Backup and Digital Display

13% Off

9.9 Easy installation

9.7 Simple to use

9.7 clearly written
Main highlights

Plug & Protect, alarm plugs into any standard 120V AC outlet with no additional mounting. Line cord allows for multiple installation options
Mute button silences unnecessary alarms. It also tests alarm function with same button
Ez view backlit digital display, easy viewing of danger levels, current, and peak CO levels in your home. Illuminates only when alarm sounds or a button is pressed
Ez access battery door, front-open compartment allows easy battery change without dismounting alarm
Battery backup, provides consistent protection for added safety during power outages
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9.6

Exceptional

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05
First Alert

First Alert Battery Operated Carbon Monoxide Alarm with Digital Display

9.1 worth the money

9.1 Easy installation

9.1 Simple to use
Main highlights

Lets you know when its time to replace
Easy to read digital display
Easy intstallation
Detects the presence of carbon monoxide
Battery operated
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9.5

Excellent

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06
Kidde

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

9.9 Easy installation

9.9 Simple to use

8.7 worth the money
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.
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9.3

Excellent

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07
Kidde

Kidde KN-COB-B-LP Nighthawk Carbon Monoxide Alarm, Battery Operated

9.9 Easy installation

9.9 Simple to use

9.9 worth the money
Main highlights

Test-reset button tests the unit for proper operation and resets the carbon monoxide alarm
Seven-year end-of-life warning alerts user to replace CO alarm
Meets the requirements of Underwriters Laboratories (UL)
Forty percent longer life than other CO alarms
Battery operated (three AAs included) to provide protection during power outages
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9.0

Excellent

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08
LSENLTY

LSENLTY Portable CO Detector Backup Battery, 3-in-1 CO Detector Plug in(CO, Temp & Humidity), Carbon Monoxide Detector with Visual & Audible(85dB) Reminder, Outdoor Air Quality Monitor for RV, Travel
Main highlights

【Multi-scenario adaptation】 Portable CO tester breaks the limitations of usage scenarios. Whether for RV monitoring or outdoor camping environment assessment, this device is ready to use right out of the box, requiring no additional setup. It can be powered by either a plug or AAA batteries, with easy battery replacement ensuring long-term, worry-free use.
【High-Precision Sensor】 This battery-powered carbon monoxide monitor uses an upgraded high-precision sensor with a 2-second refresh rate for fast detection, keeping measurement errors strictly within ±5%. CO measurement range: 0-999ppm (±5%); temperature range: -10°C-50°C/14°F-122°F (±3%); humidity range: 0%-95%RH (±5%).
【Dual-Mode Power Supply】 This upgraded plug-in co detector features both a plug-in and AAA battery power supply, eliminating the need for frequent charging. In the event of a power outage, it automatically switches to battery emergency mode, providing 24/7 uninterrupted security monitoring.
【Accurate Reminder Function】LSENLTY Portable CO Monitor comes with an intelligent notification system. Once air quality values go beyond the preset threshold, the indicator light blinks and the buzzer triggers audio prompts at the same time. The 2.7-inch HD screen delivers real-time notifications, enabling you to grasp surrounding environmental status instantly.
【5-Year Stable Monitoring】CO alarm equipped with a high-stability sensor with a 5-year lifespan, the device maintains excellent monitoring performance over time for RV camping trips.
【3-in-1 All-Purpose Monitoring】This 3-in-1 CO Tester with Temp&Humidity combines three core detection functions: co values, temperature and humidity. No need to prepare multiple separate devices. One LSENLTY air quality Tester can fully track ambient air quality fluctuations even under complex surroundings.
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8.9

Very Good

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09
First Alert

First Alert Battery Operated Smoke and Carbon Monoxide Alarm, White, PRC700A-6

9.9 Sheerness

9.7 Simple to use

9.5 Easy installation
Main highlights

Provides 2-in-1 protection from two deadly threats
Photoelectric smoke sensing technology
Low profile design
Easy intstallation
Battery operated
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8.8

Very Good

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10
First Alert

First Alert GCO1 (1039758) Plug-in Combination Explosive Gas and Carbon Monoxide Alarm with Battery Backup

9.9 Easy installation

9.7 Simple to use

9.7 clearly written
Main highlights

Plug & Protect, alarm plugs into any standard 120V AC outlet. Line cord allows for high mounting to sense methane, low mounting for propane
Mute button silences unnecessary alarms immediately. It also tests alarm functions with same button
Ez view backlit digital display, easy viewing of danger levels, current, and peak CO levels in your home
Battery backup, provides consistent protection for added safety during power outages
3-Way protection, 3 threats sensed in 1 Alarm: carbon monoxide, propane gas and natural/methane gas
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8.7

Very Good

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10 Best carbon monoxide alarm in Canada

Kidde 21026350 Plug in Carbon Monoxide Alarm with Sealed Lithium Battery Back Up

Smoke + Carbon Monoxide Combo Alarm with Voice Alerts and 10-Year Lithium Battery

First Alert CO400A Battery Powered Carbon Monoxide Alarm

First Alert CO615A Carbon Monoxide Plug-In Alarm with Battery Backup and Digital Display

First Alert Battery Operated Carbon Monoxide Alarm with Digital Display

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

Kidde KN-COB-B-LP Nighthawk Carbon Monoxide Alarm, Battery Operated

LSENLTY Portable CO Detector Backup Battery, 3-in-1 CO Detector Plug in(CO, Temp & Humidity), Carbon Monoxide Detector with Visual & Audible(85dB) Reminder, Outdoor Air Quality Monitor for RV, Travel

First Alert Battery Operated Smoke and Carbon Monoxide Alarm, White, PRC700A-6

First Alert GCO1 (1039758) Plug-in Combination Explosive Gas and Carbon Monoxide Alarm with Battery Backup

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

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

DYWL SECURITY Carbon Monoxide Detector,Carbon Monoxide Detector Plug in wall,LED Audible/Visual Alarm(Deaf-accessible), Digital Screen, Plug-and-Play – 1 pc

GasDoc DS-399 Carbon Monoxide Detector, 168H Standby, Rechargeable 3-in-1 Portable CO Detector with Audible & Visual Alerts for Travel & Camping, CO Meter for Home, Car & Tent - Dark Blue

LSENLTY Portable Carbon Monoxide Detector Plug in, Check CO, Temp and Humidity, HD Screen&Indicator Visual&Audible Alert for RV Camping Travel

Pildegro 3-in-1 Portable Carbon Monoxide Detector with Temp & RH

First Alert CO710A 10-Year Carbon Monoxide Alarm with Temperature & Digital Display

Kidde Battery-Operated Carbon Monoxide Alarm with Digital Dis

Kidde C3010 Worry-Free Carbon Monoxide Alarm with 10 Year Sealed Battery

Kidde DETECT - 120V Photoelectric Smoke + Carbon Monoxide Alarm w/AA Backup Battery (30CUAR-VCA) - Batteries Included

10 Best carbon monoxide alarm in Canada

Kidde 21026350 Plug in Carbon Monoxide Alarm with Sealed Lithium Battery Back Up

Smoke + Carbon Monoxide Combo Alarm with Voice Alerts and 10-Year Lithium Battery

First Alert CO400A Battery Powered Carbon Monoxide Alarm

First Alert CO615A Carbon Monoxide Plug-In Alarm with Battery Backup and Digital Display

First Alert Battery Operated Carbon Monoxide Alarm with Digital Display

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

Kidde KN-COB-B-LP Nighthawk Carbon Monoxide Alarm, Battery Operated

LSENLTY Portable CO Detector Backup Battery, 3-in-1 CO Detector Plug in(CO, Temp & Humidity), Carbon Monoxide Detector with Visual & Audible(85dB) Reminder, Outdoor Air Quality Monitor for RV, Travel

First Alert Battery Operated Smoke and Carbon Monoxide Alarm, White, PRC700A-6

First Alert GCO1 (1039758) Plug-in Combination Explosive Gas and Carbon Monoxide Alarm with Battery Backup

Similar products on Amazon

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

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

DYWL SECURITY Carbon Monoxide Detector,Carbon Monoxide Detector Plug in wall,LED Audible/Visual Alarm(Deaf-accessible), Digital Screen, Plug-and-Play – 1 pc

GasDoc DS-399 Carbon Monoxide Detector, 168H Standby, Rechargeable 3-in-1 Portable CO Detector with Audible & Visual Alerts for Travel & Camping, CO Meter for Home, Car & Tent - Dark Blue

LSENLTY Portable Carbon Monoxide Detector Plug in, Check CO, Temp and Humidity, HD Screen&Indicator Visual&Audible Alert for RV Camping Travel

Pildegro 3-in-1 Portable Carbon Monoxide Detector with Temp & RH

First Alert CO710A 10-Year Carbon Monoxide Alarm with Temperature & Digital Display

Kidde Battery-Operated Carbon Monoxide Alarm with Digital Dis

Kidde C3010 Worry-Free Carbon Monoxide Alarm with 10 Year Sealed Battery

Kidde DETECT - 120V Photoelectric Smoke + Carbon Monoxide Alarm w/AA Backup Battery (30CUAR-VCA) - Batteries Included

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