10 Best co2 detectors in Canada

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Last Updated - 2025/10/20

Best Choice

01
SwitchBot

SwitchBot Air Quality Monitor Indoor 5-in-1 Meter Pro CO2 Detector, CO2 Alarm, Temperature Humidity Monitor with APP, Large Display, Bluetooth Air Quality Tester for Home, Office, 2-Year Data Storage

20% Off Free Shipping
Main highlights

Portable and Durable: Our air quality detector measures 92mm x 79mm x 25mm and weighs just 154g. It has a built-in battery with up to 12 months of life and a low battery warnings. Features wall-mount holes and an adjustable bracket for versatile placement in any environment.
Part of the SwitchBot Ecosystem: With a SwitchBot Hub, your Battery Circulator Fan or Evaporative Humidifier can automatically activate when CO2 levels exceed the set threshold, enhancing ventilation. This home air quality tester also supports third-party voice control through the Hub, simplifying air quality management.
High Precision Sensor: Built with Swiss-made NDIR sensors, this CO2 monitor accurately monitors air quality by measuring CO2 levels every 1 second with an accuracy of ±50 ppm and a range of 400-9000 ppm. Its high sensitivity and stability ensure rapid and precise air quality feedback.
5-in-1 Multi-Functional Display Screen: SwitchBot Meter Pro CO2 features a 92-millimeter large screen that simultaneously displays CO2 levels, temperature, humidity, time, date, and comfort level. This indoor air quality monitor makes it easy to monitor your environment and decide when to ventilate for a healthier living space.
3 Alarm Methods: Customize CO2, temperature, and humidity range with trigger alerts. When limits are exceeded, you'll be notified via sound alarms, visual screen alerts, and app notifications (SwitchBot Hub required). With this air quality monitor, you can continuously and effectively track air quality.
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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

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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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03
First Alert

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

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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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Value for Money

04
LSENLTY

LSENLTY Upgraded Carbon Monoxide Detector Plug in Wall, CO Detector with HD Screen&Indicator Visual&Audible Alarm, 3-in-1 Air Detector for Home RV Travel Hotel

25% Off Free Shipping
Main highlights

【Upgraded HD Display】Not only can you view the air concentration value intuitively on the HD display, you can also clearly see the temperature and humidity conditions that you pay attention to daily, and say goodbye to the eye-catching small screen of the traditional air detector. You can clearly see the readings of carbon monoxide, temperature and humidity from multiple viewing angles.
【Thoughtful brightness design】You can choose high, medium, low and off screen brightness settings. The breathing light can also be turned off. Please rest assured that even when the breathing light or screen brightness is turned off, the product continues to detect the air concentration value in the surrounding environment. Once it exceeds 50PPM, the alarm indicator and screen will light up quickly, and an alarm sound of more than 85dB decibels will be issued to remind you.
【High-precision comprehensive carbon monoxide detector】The product is equipped with a precision sensor, which refreshes every 2 seconds and can quickly detect the surrounding air value. The detection range is 0-999PPM and the accuracy is ±10%. It can also be used as an indoor thermometer with a temperature range of -10℃-50℃ and an accuracy of ±1.5℃; it can also be used as a hygrometer with a humidity range of 0% ~ 95%RH and an accuracy of ±5%RH.
【Comprehensive CO detector plug-in design】 This plug-in air detector is compatible with 110V to 220V AC power sockets. Suitable for all CA standard AC sockets such as bedrooms, RVs, kitchens, living rooms, basements, hotel rooms, etc.
【Advanced electrochemical sensor】When exposed to hamful air quality, it immediately generates current, which means it responds faster and more accurately than traditional air detectors, and is not easily affected by other gases. Please note that it is normal for the product to display a reading of 000PPM when there is no hamful air in the air.
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9.4

Excellent

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05
First Alert

First Alert CO400A Battery Powered Carbon Monoxide Alarm

Free Shipping

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
Ledronco

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

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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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9.1

Excellent

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07
Kidde

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

Free Shipping

9.9 Easy installation

9.9 Simple to use

9.5 worth the money
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.
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9.0

Excellent

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08
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)

Free Shipping

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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8.9

Very Good

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09
DYWL SECURITY

DYWL SECURITY Carbon Monoxide Detectors Portable Carbon Monoxide Detector for Travel Carbon Monoxide Detector Plug in Wall with LED Digital Display Voice Light Plug and Play - 1 Pack

Free Shipping

9.9 Easy installation

8.7 Precision

8.7 Simple to use
Main highlights

When the CO concentration is 50PPM—alarm within 60-90 minutes, 100PPM—alarm within 10-40 minutes, 150PPM—85 decibel sound and light alarm within 5 seconds to remind you The environment is dangerous.
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.
Plug and play. whether you are at home or traveling, it can be hung anywhere with a power supply.
People cannot feel through their five senses. you need one or more CO detectors to ensure your personal safety.
Carbon monoxide monitors and displays the readings in real time, allowing you to quickly understand the environmental conditions.
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8.8

Very Good

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10
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 (2 Pack)

Free Shipping

9.5 Easy installation

9.3 Simple to use

8.9 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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8.7

Very Good

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