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5 Best Carbon Monoxide Detectors of 2025

Last Updated - 08/05/2025

1
Best Choice

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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.

Navaris

Navaris Magnetic Smoke Detector Mounting Pad, 10 Pack - Magnetic Adhesive Pads for Quick and Easy Installation of Smoke Alarms - No Drilling or Screws

Navaris

£11.99

More Details
Main highlights
- VERSATILE: The magnetic mounting pads can be used for smoke and fire detectors, carbon monoxide detectors and other types of mounted products.
- SET OF 10: Included in the set are ten magnetic stickers made of neodymium and iron foil for installing smoke detectors in your home. Each magnet measures 7 x 0.6 cm (2.75 x 0.24 inches) for a seamless and discreet installation.
- SECURE HOLD: The self adhesive surface and magnetic attachments offer an extra strong and stable hold. Neodymium magnets have extraordinary strength, so you can feel safe knowing that your smoke detector will stay securely attached.
- IN NO TIME: Mount your smoke and fire alarms to the ceiling in just a few seconds. Secure your home against the start of fires without needing any tools.
- HOW TO USE: Remove the protective film from the magnetic pads and stick one to the ceiling and another onto the smoke alarm. Mount the smoke detector plate to the ceiling for a quick and easy installation. No mess and no fuss.
£11.99
2
15% Off

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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
15% Off

FireAngel Digital Carbon Monoxide Detector with 10-Year Sealed for Life Battery - FA3322 Humidity, Temperature and CO Alarm - Portable Carbon Monoxide Alarms for Home and Travel - CO Detector Monitor

Fireangel

£33.99

£39.99
(15% Off)

More Details
Main highlights
- TEMPERATURE AND HUMIDITY ALERTS: The FireAngel carbon monoxide alarm also provides temperature and humidity readings. Warnings will sound if either reach extreme highs or lows, making the device perfect for bedrooms and living spaces.
- SAFETY ASSURED: The FA3322 carbon monoxide monitor has been rigorously tested and is certified to Kitemark standard KM551504. Suitable for domestic premises only.
- PORTABLE CARBON MONOXIDE DETECTOR: Each device comes with an integrated mounting bracket and screws for an easy-to-fit setup. Measuring 120 x 76 x 31 mm, it’s compact enough to travel with, providing on the go holiday protection.
- PEACE OF MIND: With a digital display and an advanced sensor, the FA3322 offers the highest level of CO detection for your home. When high CO levels are detected, 4 loud chirps, a red LCD, and flashing safety advice will alert you to ‘EVACUATE!’.
- LOW LEVEL CO WARNING: When low CO levels are detected over a sustained period, an early ‘pre alarm' will sound. The alarm pattern includes 1 short chirp followed by 1 long chirp, an amber LCD screen, and a flashing ‘WARNING’ with CO PPM values.
- LIFETIME BATTERY: Each digital CO monitor contains a 10-year battery sealed within, offering protection for the lifetime of the device without ever needing to change the batteries.
- FIREANGEL HOME PROTECTION: In addition to our CO detectors for home use, 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.
£33.99
£39.99 (15% Off)
3
Best Value
39% Off

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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
39% Off

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

Kidde

£22.94

£37.78
(39% Off)

More Details
Main highlights
- Digital display that shows current CO levels (from 10 ppm)
- 10 year sealed battery
- 10 year manufacturer's warranty
£22.94
£37.78 (39% Off)
4
19% Off

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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
19% 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

Fireangel

£14.50

£17.99
(19% 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.
£14.50
£17.99 (19% Off)
5

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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

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

Kidde

£13.99

More Details
Main highlights
- TUV Certified to EN 50291-1:2018
- 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
- Electro-chemical CO sensor accurately detects the presence of Carbon Monoxide and emits a loud, clear alarm to alert residents
- CE marked, and UKCA tested and certified
- Accurately alarms from 50 ppm of CO in the air
- 3 Year Manufacturer’s Warranty
£13.99

5 Best Carbon Monoxide Detectors of 2025

Navaris Magnetic Smoke Detector Mounting Pad, 10 Pack - Magnetic Adhesive Pads for Quick and Easy Installation of Smoke Alarms - No Drilling or Screws

FireAngel Digital Carbon Monoxide Detector with 10-Year Sealed for Life Battery - FA3322 Humidity, Temperature and CO Alarm - Portable Carbon Monoxide Alarms for Home and Travel - CO Detector Monitor

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

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

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

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