Advertising Disclosure

5 Best Carbon Monoxide Detectors of 2026

Last Updated - 05/04/2026

1
Best Choice
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.

Fireangel
23% Off

FireAngel Carbon Monoxide Alarm and Detector - FA6813 10-Year Sensor Life CO Alarm for Home w/Batteries - Travel, Portable Carbon Monoxide Detector - CO Detector Monitor w/Test Button - 2-Pack

Picked by 475 people in the last week

Fireangel

£26.94

£34.99
(23% Off)

More Details
Main highlights
- TRAVEL CARBON MONOXIDE DETECTOR: Each compact device measures 120 x 73 x 35.5 mm and comes with an integrated mounting bracket and screws, allowing for easy wall mounting. With 2 devices per pack, take 1 with you for on the go holiday protection.
- 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.
- 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.
- 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.
- 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.
- 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.
£26.94
£34.99 (23% Off)
2

✖
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.

Fireangel

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

£25.99

More Details
Main highlights
- SAFETY ASSURED: Suitable for all domestic and rental premises, the FA3820 carbon monoxide monitor is 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.
- 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.
- 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.
- 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'.
- 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.
- 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.
- 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.
£25.99
3
27% 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.

Fireangel
27% Off

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, Single

Fireangel

£13.11

£17.99
(27% Off)

More Details
Main highlights
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
£13.11
£17.99 (27% Off)
4
Best Value
32% 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
32% Off

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

Kidde

£13.00

£18.99
(32% Off)

More Details
Main highlights
- 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)
- 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 monoxide
- 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
- 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
- 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
£13.00
£18.99 (32% Off)
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

Twin Pack Kidde 5CO Battery Powered Carbon Monoxide Alarm and Detector - 10 Year Sensor Life with AA Batteries

Kidde

£25.50

More Details
Main highlights
- 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)
- 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 monoxide
- 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
- 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
- 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
£25.50

5 Best Carbon Monoxide Detectors of 2026

FireAngel Carbon Monoxide Alarm and Detector - FA6813 10-Year Sensor Life CO Alarm for Home w/Batteries - Travel, Portable Carbon Monoxide Detector - CO Detector Monitor w/Test Button - 2-Pack

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 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, Single

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

Twin Pack Kidde 5CO Battery Powered Carbon Monoxide Alarm and Detector - 10 Year Sensor Life with AA Batteries

You may also like...

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

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

Carbon Monoxide Detector with Digital Display,CO Alarm with Replaceable Battery - 10 Year Sensor Life,Portable Carbon Monoxide Alarm for Home with Memory Alarm Function,Comforms to EN 50291 Standard.

Carbon Monoxide Detector with Digital Display,CO Alarm with Replaceable Battery - 10 Year Sensor Life,Portable Carbon Monoxide Alarm for Home with Memory Alarm Function,Comforms to EN 50291 Standard.

FireAngel FA6812 Digital Carbon Monoxide Detector with LCD Screen, 10-Year CO Alarm Sensor, Portable Carbon Monoxide Alarm for Home, Travel, Caravan

Carbon Monoxide Detector, Carbon Monoxide Alarm, Detector with LED Display (PPM Value Visible at All Times) and 85 dB Audible and Visual Alarm.

Carbon Monoxide Detector,Carbon Monoxide Alarm with PPM Display,CO Alarm with Test Button Battery Powered,CO Detector Monitor with 85 dB Audible for Home and Holiday(Batteries NOT Included)

Mini LCD Carbon Monoxide Detector CO Alarm Detector, fit for house, Car,trip，Comply with EN50291

Kidde 5DCO Digital Carbon Monoxide Alarm and Detector with AA Batteries - 10 Year Sensor Life Digital Display CO Alarm - 7 Year Warranty

EIBEST Carbon Monoxide Detector,Carbon Monoxide Alarm, CO Detector With LED display And 85 Decibel Sound And Light Alarm

Sign up and get exclusive special deals