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Top 10 Carbon Dioxide Monitor

Discover our curated selection of high-quality products.

Last update: 06-05-2025

1
Kidde 5CO Carbon Monoxide Alarm and Detector with AA Batteries - 10 Year Sensor Life CO Alarm for Home

Kidde 5CO Carbon Monoxide Alarm and Detector with AA Batteries - 10 Year Sensor Life CO Alarm for Home

  • BATTERY POWERED: Each alarm comes equipped with 2x AA batteries included, allowing your alarm to be set up immediately upon receipt
  • 7 YEAR WARRANTY: Enjoy peace of mind knowing your alarm is protected with an extensive seven year manufacturer’s warranty
  • FREE STANDING OR WALL MOUNTED: For ease of installation, the Kidde 5CO model can be placed free standing on any surface, or can be wall mounted with the included screws and wall plugs
  • LIGHTWEIGHT & COMPACT: The 5CO’s sleek design allows this life-saving device to blend into your décor, while remaining uncompromising on its strict quality testing
  • LOUD & ACCURATE ALARM: From just 50ppm of CO in the air, the Kidde 5CO will emit a loud 85db piercing alarm alerting occupants to the presence of carbon monoxid
  • SAFETY APPROVED: CE and UKCA marked, and Kitemarked to the most up-to-date British Standards Institute (BSI) standard for carbon monoxide alarms (BS EN 50291-1:2018)
9.5/10
2
Kidde 5DCO 10 Year Life Battery Powered Digital Display Carbon Monoxide Alarm

Kidde 5DCO 10 Year Life Battery Powered Digital Display Carbon Monoxide Alarm

  • Compact, slimline case. Dimensions = 127mm x 73mm x 39mm. Weight = 170g.
  • 10 year sensor lifespan. Powered by two replaceable AA batteries (supplied).
  • Warning "chirp" and digital display message indicates when batteries are low.
  • Digital display of CO levels from 30ppm. Detector alarms from 50ppm.
  • Kitemarked to BS EN 50291-1 (domestic use). CE and UKCA marked
9.3/10
3
FireAngel Carbon Monoxide Alarm and Detector - FA6813 10-Year Sensor Life CO Alarm for Home with AA Batteries - Travel, Portable Carbon Monoxide Detector - CO Detector Monitor with Test Button

FireAngel Carbon Monoxide Alarm and Detector - FA6813 10-Year Sensor Life CO Alarm for Home with AA Batteries - Travel, Portable Carbon Monoxide Detector - CO Detector Monitor with Test Button

  • CARBON MONOXIDE ALARMS FOR HOME USE: The advanced electrochemical sensor detects dangerous levels of carbon monoxide (CO) in your home, alerting you with 4 loud chirps (85 dB(A) at 3 metres) and a flashing red ‘CO’ LED light. NEVER IGNORE THIS ALARM.
  • TEST BUTTON: Press the large test button to ensure your CO detector is working properly. A loud, high-pitched sound and the red LED flashing four times will verify that the alarm is functioning correctly.
  • BATTERIES INCLUDED: Each CO monitor comes with 2 replaceable AA batteries. A flashing amber '!' and an audible chirp will alert you when the batteries need replacing. Test your FireAngel carbon monoxide alarm regularly to ensure it is operational.
  • SLEEP EASY FUNCTION: Press the large test button to silence the low battery alert. This activates the Sleep Easy mode on the carbon monoxide monitor, muting the low battery chirp for 8 hours whilst the amber light flashes. Replace the batteries ASAP.
  • TRAVEL CARBON MONOXIDE DETECTOR: Each portable device comes with an integrated mounting bracket and screws, allowing for easy wall mounting. Measuring 120 x 73 x 35.5 mm, it’s compact enough to travel with, providing on the go holiday protection.
  • SAFETY ASSURED: The FA6813 detector holds a CE & UKCA mark and has been designed to conform to the standards BS EN 50291-1: 2008 and EN 50291-2: 2019. Suitable for homes in England and Wales, but not for Scottish homes under the new regulations.
  • FIREANGEL HOME PROTECTION: In addition to our carbon monoxide detectors, we offer a wide range of other safety products designed to protect you and your family. Choose from smart and wireless devices, as well as standard fire, smoke, and heat alarms.
9.1/10
4
Kidde 10LLDCO Ten Year Life Carbon Monoxide Alarm Digital Display with Sealed Longlife Battery

Kidde 10LLDCO Ten Year Life Carbon Monoxide Alarm Digital Display with Sealed Longlife Battery

  • Digital display that shows current CO levels (from 10 ppm)
  • 10 year sealed battery
  • 10 year manufacturer's warranty
9.0/10
5
Scondaor Carbon Monoxide Alarm Detector EN 50291 Certified, CO Alarm Detector with Digital Display, Battery Powered, 10 Year Sensor

Scondaor Carbon Monoxide Alarm Detector EN 50291 Certified, CO Alarm Detector with Digital Display, Battery Powered, 10 Year Sensor

  • High Quality Carbon Monoxide Detector: High accuracy and reliable 10 year life electrochemical CO sensor and the CO alarm in compliance with EN 50291 standard. Quickly sound 85dB audible alarm and Red LED flashes when dangerous level CO gas is detected to alert home members effectively
  • Large Digital LCD Display: Clearly display real time CO concentration in PPM, ambient temperature and battery level. Display CO values higher than 25PPM. Three LED indicators easy to know its operation status
  • High Valued Alarm Features: Automatic self-check function, Alarm concentration record and Test /Silence features. False alarm can be silenced by press "Test" button
  • 10-Year Protection and Convinent to Use: Powered by 3 replaceable 1.5 V AA batteries (Battery Not included). Low-Battery warning signal to alert users to replace the batteries. End of Life warning signal to alert users to replace the alarm after 10-year operation
  • Widely Used: Compact size and can be easily wall or ceiling mounted and free-standing desktop use. It is suitable for home, travel or camping use
8.9/10
6
Smoke & Carbon Monoxide Alarm with Digital LCD Display, AEGISLINK Combination Smoke and CO Alarm Detector with 10-Year Lifespan & Replaceable Battery and Test/Silence Button, SC200

Smoke & Carbon Monoxide Alarm with Digital LCD Display, AEGISLINK Combination Smoke and CO Alarm Detector with 10-Year Lifespan & Replaceable Battery and Test/Silence Button, SC200

  • Informative LCD shows real-time CO concentrations and battery power to monitor for CO leaks and battery level; to save power, it will activate only when the device is tested or the ppm has reached the alarm level for a certain period
  • This smoke and carbon monoxide alarm has long-lasting sensors and components that deliver a long life of up to 10 years; also includes a replaceable 3-year lithium battery
  • Featuring a light and thin design, this combination smoke and carbon monoxide detector has a 20–40 m² (215–430 sq. ft) detection range, fully protecting you and your family from dangerous smoke and carbon monoxide
  • This smoke and carbon monoxide detector is built with both a cutting-edge photoelectric smoke sensor and electrochemical CO sensor to deliver high consistency and reliability for double detection and protection
  • The loud alarm tone is over 85 dB at 10 ft (3 m) to alert anyone in a deep sleep; with included screws and anchor plugs, this battery-operated unit can be installed effortlessly without an electrician
8.6/10
7
Kidde 2030-DCR Compact 10 Year Life Carbon Monoxide Alarm with AA batteries

Kidde 2030-DCR Compact 10 Year Life Carbon Monoxide Alarm with AA batteries

  • Accurately alarms from 50 ppm of CO in the air
  • Electro-chemical CO sensor accurately detects the presence of Carbon Monoxide and emits a loud, clear alarm to alert residents
  • Suitable for installations in homes in England and Wales (not suitable for homes in Scotland under the new 2022 legislation)
  • Sleek & compact - dimensions (HxWxD): 61 x 96 x 38mm
  • Provides low battery warning when batteries require replacement
  • CE marked, and UKCA tested and certified
  • 3 Year Manufacturer’s Warranty
  • TUV Certified to EN 50291-1:2018
8.4/10
8
FireAngel Carbon Monoxide Detector 10-Year Life Sealed Battery - FA3820 Carbon Monoxide Alarm for Home and Holiday - Portable CO Alarm - Travel Carbon Monoxide Detector and Monitor - White

FireAngel Carbon Monoxide Detector 10-Year Life Sealed Battery - FA3820 Carbon Monoxide Alarm for Home and Holiday - Portable CO Alarm - Travel Carbon Monoxide Detector and Monitor - White

  • CARBON MONOXIDE ALARMS FOR HOME USE: The advanced electrochemical sensor detects dangerous levels of carbon monoxide (CO) in your home, alerting you with 4 loud chirps (85 dB(A) at 3 metres) and a flashing red ‘CO’ LED light.
  • ENHANCED SENSING: The alarm’s high sensitivity mode will activate if it predicts that CO levels will rise to or above 180 ppm, providing a quicker alert and a ‘pre alarm’ with a visual instruction to ‘ventilate'.
  • 10-YEAR SEALED FOR LIFE BATTERY: Each CO monitor is fitted with a sealed, tamper proof, 10 year battery that will last the lifetime of the alarm. A flashing amber '!' and an audible beep will alert you when the device needs replacing.
  • ALARM MEMORY: Your device will notify you of a CO alarm in your absence. If not silenced, the alarm will continue to sound until CO levels are safe. The red ‘CO’ light will continue flashing as a visual indication of a previous activation.
  • PORTABLE CARBON MONOXIDE DETECTOR: Measuring 125 x 67 x 33 mm, this compact, free standing device is travel friendly and provides protection wherever you go. It also includes an integrated mounting bracket and screws for easy wall mounting.
  • SAFETY ASSURED: Suitable for all domestic and rental premises, the FA3820 carbon monoxide monitor is CE and UKCA marked, Kitemark certified, and third-party approved by the British Standards Institute (BSI) to BS EN 50291-1:2018 and EN 50291-2:2019.
  • FIREANGEL HOME PROTECTION: In addition to our carbon monoxide detectors, we offer a wide range of other safety products designed to protect you and your family. Choose from smart and wireless devices, as well as standard fire, smoke, and heat alarms.
8.2/10
9
X-Sense Carbon Monoxide Detector, Replaceable Battery Powered CO Alarm with Digital Display, Portable Carbon Monoxide Alarm for Home with CO Peak Value Memory, XC0C-SR, 1-Pack

X-Sense Carbon Monoxide Detector, Replaceable Battery Powered CO Alarm with Digital Display, Portable Carbon Monoxide Alarm for Home with CO Peak Value Memory, XC0C-SR, 1-Pack

  • 10-Year Lifespan: Protect your loved ones from the silent threat of carbon monoxide for an entire decade with this reliable 10-year CO sensor; powered by replaceable AA batteries that last 3 years
  • Versatile Placement Options: This carbon monoxide detector's freestanding design allows you to place it on any flat surface, such as a desk, bookshelf, or bedside table; screws are also included to mount it on the wall
  • Sleek and Compact: Measuring just 75 × 142 × 32 mm, this small and unobtrusive carbon monoxide alarm looks good in any room, meaning you never have to compromise style for safety
  • Intuitive to Use: Easily use this alarm even in urgent situations thanks to its simple, size-differentiated buttons; enjoy reliable access to critical functions like checking the peak CO levels or testing/silencing the alarm
  • Easy to Understand: See the current CO level on a clear display; a tri-color LED tells you the alarm’s status at a glance: red for alarm, yellow for fault or low battery, and green for working normally
8.0/10
10
SAF Aranet4 Home: Smart Indoor Air Quality Monitor - CO2, Temperature, Humidity, Portable & Battery-Powered, E-Ink Screen, Free App Integration

SAF Aranet4 Home: Smart Indoor Air Quality Monitor - CO2, Temperature, Humidity, Portable & Battery-Powered, E-Ink Screen, Free App Integration

  • The perfect companion for indoor use, allows you to monitor CO2 content, temperature, relative humidity and air pressure in real time
  • Easy for everyone to use – the colour coding and the optional buzzer warns you when the CO2 concentration becomes too high
  • The energy-efficient E-Ink display ensures a particularly long battery life of the radio
  • Smartphone app for viewing and analyzing historical data up to 90 days history
  • Uses non-dispersive infrared sensor technology (NDIR) for the most accurate and reliable CO2 readings
7.6/10

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Carbon Monoxide Detector with LCD Digital Display, CE Certified CO Alarm with Sealed in 10 Year Battery, Standalone Audible CO Detector for Home,Black,1 Pack

Carbon Monoxide Detector with LCD Digital Display, CE Certified CO Alarm with Sealed in 10 Year Battery, Standalone Audible CO Detector for Home,Black,1 Pack

FireAngel Carbon Monoxide Alarm and Detector - FA3313 10-Year Sensor Life CO Alarm for Home with 1-Year Replaceable Batteries - Travel, Portable Carbon Monoxide Detector - CO Detector Monitor - White

FireAngel Carbon Monoxide Alarm and Detector - FA3313 10-Year Sensor Life CO Alarm for Home with 1-Year Replaceable Batteries - Travel, Portable Carbon Monoxide Detector - CO Detector Monitor - White

CPVAN Carbon Monoxide Detector Alarm, 3-in-1 CO Detctor 10 Year Sensor Life Replaceable Battery with Digital Display Portable Carbon Monoxide Alarm for Home EN 50291 Standard (CO, Temp and Humidity)

CPVAN Carbon Monoxide Detector Alarm, 3-in-1 CO Detctor 10 Year Sensor Life Replaceable Battery with Digital Display Portable Carbon Monoxide Alarm for Home EN 50291 Standard (CO, Temp and Humidity)

Carbon Monoxide Detector, 10 Years Battery Carbon Monoxide Alarm, CO Alarm with LCD Display and Test/Silence Button Conforms to EN50291 Standard

Carbon Monoxide Detector, 10 Years Battery Carbon Monoxide Alarm, CO Alarm with LCD Display and Test/Silence Button Conforms to EN50291 Standard

SwitchBot CO2 detector with Built-in Hygrometer, Temperature Humidity Monitor with carbon dioxide monitor, Bluetooth CO2 Monitor, 2-Year Data Storage, SwitchBot Hub Required for WiFi Function

SwitchBot CO2 detector with Built-in Hygrometer, Temperature Humidity Monitor with carbon dioxide monitor, Bluetooth CO2 Monitor, 2-Year Data Storage, SwitchBot Hub Required for WiFi Function

Carbon Monoxide Detector, CO Detectors with LED Indicator & Silence Button, EN 50291 CO Alarms Monitor for Home Safety (AA Battery NOT Included) (1PCS CARBON MONOXIDE DETECTOR)

Carbon Monoxide Detector, CO Detectors with LED Indicator & Silence Button, EN 50291 CO Alarms Monitor for Home Safety (AA Battery NOT Included) (1PCS CARBON MONOXIDE DETECTOR)

Mini Carbon Monoxide Detector, Battery Powered CO monoxide Alarm with LCD Digital Display for Home and Car Safety, CO Monitor Conforms to EN 50291 Standad (1pcs)

Mini Carbon Monoxide Detector, Battery Powered CO monoxide Alarm with LCD Digital Display for Home and Car Safety, CO Monitor Conforms to EN 50291 Standad (1pcs)

Newentor CO2 Monitor, Air Quality Monitor Indoor Carbon Dioxide Detector with Voice Alert Large Display, Temperature Humidity, Alarm Clocks for Home, RV, Office, Classroom, 400-5000ppm, Black

Newentor CO2 Monitor, Air Quality Monitor Indoor Carbon Dioxide Detector with Voice Alert Large Display, Temperature Humidity, Alarm Clocks for Home, RV, Office, Classroom, 400-5000ppm, Black

Temtop Air Quality Monitor CO2 Bluetooth Thermo-Hygrometer Digital Hygrometer Indoor Humidity Gauge for Home Office Humidity Monitor for Bedroom Livingroom

Temtop Air Quality Monitor CO2 Bluetooth Thermo-Hygrometer Digital Hygrometer Indoor Humidity Gauge for Home Office Humidity Monitor for Bedroom Livingroom

Carbon Monoxide Detector 10 Year Sealed Battery |Portable Alarm|EN50291:2018 |No Display (Black)

Carbon Monoxide Detector 10 Year Sealed Battery |Portable Alarm|EN50291:2018 |No Display (Black)

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