10 Best carbon monoxide alarm in Canada

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Last Updated - 2026/04/01

Best Choice

01
First Alert

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

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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9.9

Exceptional

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02
First Alert

First Alert SCO5RVA Battery Operated Combination Carbon Monoxide and Smoke Alarm

9.5 Easy installation

9.5 Sheerness

9.3 Simple to use
Main highlights

Photoelectric sensor detects smoke while minimizing false alarms
Electrochemical CO sensor alerts you to carbon monoxide danger. Age 3 - 8 years
Date on the alarm indicates when the alarm was manufactured.
Combination smoke detector/carbon monoxide alarm detects two threats
Battery-operated unit installs quickly and easily without an electrician
A single button tests the unit or silences the alarm. Where to install - kitchen, living room, basement, bathrooms, hallway, indoors
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9.8

Exceptional

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Value for Money

03
First Alert

First Alert CO605A Carbon Monoxide Plug-In 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 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
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9.6

Exceptional

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04
Ledronco

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

9.5 Simple to use

9.3 Easy installation

8.9 worth the money
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.
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9.4

Excellent

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05
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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9.3

Excellent

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06
LSENLTY

LSENLTY Carbon Monoxide Detector Plug in, Check CO, Temp and Humidity, HD Screen&Indicator Visual&Audible Alert for Home RV Camping
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 5 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 14℉ ~ 122℉ 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 co 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 CO 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 carbon monoxide detector is compatible with 110V to 220V AC power outlets.
【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. Say goodbye to traditional carbon monoxide detectors that are eye-catching with small screens.
Note: This device only supports the detection of carbon monoxide, temperature, and humidity in the air. It does not support the detection of carbon dioxide, smoke, or flammable gases such as methane and propane.
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9.2

Excellent

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07
IQYEF

5-in-1Upgraded Plug-in Carbon Monoxide Detector, Combination Carbon Monoxide & Smoke &Gas Alarm, Builti-in Backup Battery and HD Screen for Home

77% Off
Main highlights

【Integrated 3000mAh Emergency Backup Battery】With a 24-hour runtime, this rechargeable lithium-ion battery helps manage sudden power outages. Compared to disposable batteries, it saves you the cost of frequent replacements.
【Easy Plug-and-Play Design】Compatible with outlets ranging from 100V to 240V AC, this detector fits all standard AC outlets in bedrooms, kitchens, living rooms, basements, hotel rooms, and more. Simply plug it in, and it will work continuously throughout the day.
【Comprehensive Gas Environment Safety】Equipped with independent sensors for smoke, CO, and combustible gases, along with an HD display and 85 dB audible alarm, this detector provides real-time monitoring of your gas environment, ensuring added safety for you and your family.
【5in1 Upgraded CO & Smoke &Natural gas detectors】IQYEF’s latest combination 5-in-1 detectors Integrated carbon monoxide, smoke, Combustible gas( like natural gas, liquefied petroleum gas (LPG), methane (CH4), Ethane (C2H6), propane (C3H8), butane (C4H10), etc.), temperature and humidity, offering real-time monitoring of your environment's gas safety.
【2.1-inch HD Display】All data is displayed in real-time on the HD screen, making it easy to read large icons such as CO ppm, smoke indication bars, combustible gas warning icons, humidity levels, temperature, CO indicator icons, power status, and alarm status.
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9.0

Excellent

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08
Gedsffati

5-in-1 Plug in Carbon Monoxide Detector & Smoke & Natural Gas Combination Detectors with Backup Battery Temp Humidity 85dB CO Alarm for Home Hotel RV White

23% Off
Main highlights

【Visilble & Audible】 The detecting datas real times and dynamically show on the HD screen, we can read the data faster from the big icons like: CO ppm, Smoke indicating bar, Combustible gas warning icon, humidity, temperature, CO indicator icon, plug and alarm status.The detector will emit a 85dB beep alarm sound when the hazardous gase and smoke concentration exceeds the alarm value.
【Plug in & Play design】Compatible with 110V to 220V AC CA standard outlet. Just Plug in and the CO & smoke & gas combination detector will real-time work all day.Easily enhance safety in bedroom, kitchen, living-room, basement, hotel room, garage, Tool room etc.
【Built-in 1000 mAh Blackup battery】Provides 9-10h battery power working time, helps to cope with any sudden power outages. And rechargable lithium battery design helps you save a lot of battery replacement costs.
【5in1 CO & Smoke &Natural gas detectors】Our Gedsffati All-in-1 combination detectors Integrated carbon monoxide, smoke, Combustible gas( as natural gas, propane, methane, natural gas, coal gas, gasoline, Hexane, butane, benzene, ethyene oxide, acetylene, LPG, LNG, etc), temperature and humidity sensors, real time to detector and enhance the home environment gas safety for us.
【 Tested Approved】 Built-in tested approved Smoke / CO / Combustible gas sensor, bring you extra safety for you and family.
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8.9

Very Good

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09
YHOCO

Carbon Monoxide Alarm, Digital Display CO Detector Security CO Monoxide for Home Kitchen Bedroom Safety Battery Powered (Battery not Included),Comply with CSA 6.19 (1 Pack)

9.7 Easy installation

9.5 Simple to use

9.1 worth the money
Main highlights

【UNIQUE DESIGN]: Build in Carbon Monoxide Alarm With LED Display,Electrochmical sensor,high consistency and stability with nice outlooking
【Suitable for all places]: houses, shops, hotels, restaurants, office buildings, schools, banks, libraries, computer rooms and warehouses, etc.
【Audible and Visual Warning]: 85 dB loud alarm beeps and red LED flashes when dangerous level CO gas is detected to provide instant alert signal effectively
【Alarm Stardant&ENERGY]: 50ppm,alert 90 minutes,100ppm,alert within 40 minutes,300ppm,alert within 3 mintues. Battery: DC3V (2*1.5V AA battery powered ),(Battery Not Inlcuded)
【Alarm Standard&LED display]:the alert time depend the level of carbon monoxide concentration, And the display screen of the carbon monoxide alarm can accurately measure the concentration of carbon monoxide and its concentration data. The CO level is between 000 to 999ppm. "LB" it displays for low battery and need to change battery, 'Err' on the LCD to indicate the unit ,then talk with our services.
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8.8

Very Good

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10
FLUNGSKY

3-in-1 Carbon Monoxide Detector, Carbon Monoxide Detector Plug in Wall with Temperature & Humidity Display, CO Alarm Monitor with Color LCD Display, Accurate & Easy to Install

16% Off
Main highlights

Worry-Free After Service - We are willing to provide you with unconditional returns and exchanges within 90 days. If you have any questions, please contact us by email, we will try our best to help you solve the problem.
Widely Used - This CO detector alarm can be used in Kitchens, Bathrooms, RVs, Parking lots, Ironworks, Chemical Plants, etc.
Professional Temperature and Humidity Sensor - This Air quality monitor use professional temperature and humidity sensor, Allows you to see at a glance, Clear the condition of the surrounding environment.
Easy to Install - Plug and play, saving installation time. whether you are at home or traveling, it can be hung anywhere with a power supply.
Accuracy & Durability - This Plug in carbon monoxide detector use Imported Electrochemical Sensor, high reliability, more responsive, when the CO gas concentration reaches the alarm level(>150ppm), the Voice and Light alarm will work.
3 In 1 CO Detector - Our carbon monoxide detector equipped with 3 major air indicators of Carbon Monoxide, Temperature, and Humidity to protect your family.
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8.7

Very Good

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