Best Carbon Monoxide Detector British Gas Approved of 2026

Last updated on 03/04/2026
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Best Choice
1
9.9
Exceptional
Save 23%
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

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

23% Off
Why we love it
  • Alerts with flashing lights.
  • Test button ensures functionality.
  • Includes replaceable AA batteries.
Main Highlights
  • 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 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.
  • 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.
9.9
Exceptional
Save 23%
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Best Value
2
9.7
Exceptional
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

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

Why we love it
  • Loud alarm alerts immediately.
  • Certified by British Standards.
  • Portable and versatile design.
Main Highlights
  • 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 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.
9.7
Exceptional
Amazon Logo
3
9.5
Superb
Twin Pack Kidde 5CO Battery Powered Carbon Monoxide Alarm and Detector - 10 Year Sensor Life with AA Batteries
Kidde

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

Why we love it
  • Accurate carbon monoxide detection.
  • Portable with sleek design.
  • End of life alert.
Main Highlights
  • 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 monoxide
  • 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
Superb
Amazon Logo
4
9.3
Superb
Save 13%
Carbon Monoxide Detector – 10-Year Sealed Battery CO Alarm with LCD Display, Carbon Monoxide Alarms for Home, EN 50291 Certified – Alertlink VC22R
Alertlink

Carbon Monoxide Detector – 10-Year Sealed Battery CO Alarm with LCD Display, Carbon Monoxide Alarms for Home, EN 50291 Certified – Alertlink VC22R

13% Off
Why we love it
  • Accurate CO detection guaranteed.
  • Maintenance-free for 10 years.
  • Real-time monitoring for safety.
Main Highlights
  • Certified Accuracy & Loud Alert – Complies with EN 50291 and UKCA standards, this reliable carbon monoxide alarm accurately monitors CO levels in ambient air. When a danger is detected, it instantly triggers a powerful 85dB siren to warn you and your family, providing round-the-clock protection.
  • 10-Year Maintenance-Free Battery – Built-in sealed lithium battery delivers 10 years of continuous power without replacements or wiring. Auto power-saving mode ensures energy efficiency when not in use, making it ideal for long-term home safety.
  • Clear Real-Time LCD Display – The high-contrast LCD screen provides a clear and constant view of CO levels, even when at zero. The built-in backlight guarantees visibility in dark conditions, enabling safe and easy checks at any time of day.
  • Intuitive LED Indicators – Equipped with three distinct LED lights for instant status updates: green for normal operation, red for danger, and yellow for fault. These intuitive indicators ensure you always know your carbon monoxide detector is working correctly.
  • Flexible Installation & Versatile Use – Can be wall-mounted or placed on any flat surface, perfect for bedrooms, kitchens, RVs, and even travel use. The compact, modern design blends seamlessly into any home environment without compromise.
9.3
Superb
Save 13%
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5
9.2
Superb
Save 15%
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

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

15% Off
Why we love it
  • Certified to Kitemark standards.
  • Provides written safety instructions.
  • 10-year sealed battery.
Main Highlights
  • 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!’.
  • 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.
  • 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.
  • 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.
  • 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.
  • SAFETY ASSURED: The FA3322 carbon monoxide monitor has been rigorously tested and is certified to Kitemark standard KM551504. Suitable for domestic premises only.
  • 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.
9.2
Superb
Save 15%
Amazon Logo
6
9.1
Superb
Save 32%
Kidde 5CO Carbon Monoxide Alarm and Detector with AA Batteries - 10 Year Sensor Life CO Alarm for Home
Kidde

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

32% Off
Why we love it
  • Continuous carbon monoxide monitoring.
  • Portable and travel-friendly.
  • Long-lasting battery operation.
Main Highlights
  • 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 monoxide
  • 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)
9.1
Superb
Save 32%
Amazon Logo
7
9.0
Superb
Save 27%
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

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

27% Off
Why we love it
  • Clear and loud alarm.
  • Replaceable AA batteries included.
  • Portable for travel safety.
Main Highlights
  • 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.
9.0
Superb
Save 27%
Amazon Logo
8
8.9
Excellent
Save 15%
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.
Safeliveo

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.

15% OffLimited time deal
Why we love it
  • Replaceable batteries for convenience.
  • Low-level warnings for safety.
  • Digital display for easy reading.
Main Highlights
  • Replaceable Batteries: This Carbon Monoxide Detector is powered by two replaceable AA batteries that last 1 years. Equipped with a 10-year lifespan electrochemical sensor, it can more accurately detect dangerous carbon monoxide concentrations and trigger the alarm quickly.
  • Low Level Warning: When the CO concentration reaches 20 ppm and persists for 35 minutes, the device will issue a low level of CO warning. This feature is useful for vulnerable groups such as children, pregnant women, the elderly, and those with respiratory, heart, or other health conditions.
  • Safe and Reliable: A CE-certified carbon monoxide alarm compliant with BS EN 50291-1: 2018. When dangerous levels of carbon monoxide are detected, a red LED flashes and an audible alarm exceeding 85dB sounds to alert your family.
  • Standby Indicator Function：You can quickly double-click the “Test/Mute” button to activate or deactivate the standby LED indicator. When activated, a lightbulb symbol appears on the display, and the CO alarm flashes a green LED once every 60 seconds while in standby mode. When deactivated, the lightbulb symbol disappears, and the alarm does not flash a green light during standby.
  • Digital Display: See the current CO level on a clear display, the minimum reading is 10 ppm. The CO detector has a detection range of 20 to 40 square meters.
  • Easy Intsalltion: Measuring just 60 × 105 × 32.7 mm, this small and unobtrusive Carbon Monoxide Alarm ，It can be placed free standing on any surface, or can be wall mounted with the included screws. It serves as a portable carbon monoxide monitor.
  • Low Battery & End of Life Warning: If the battery is low , the CO alarm beeps once every 60 seconds, and the yellow LED indicator flashes once. If the CO detector reaches the end of service life,the carbon monoxide beeps twice every 30 seconds, and Yellow LED indicator flashes twice.
8.9
Excellent
Save 15%
Limited time deal
Amazon Logo
9
8.7
Excellent
BLACK+DECKER Carbon Monoxide Alarm and Detector. 10 Year Battery Life With Built In Lithium Battery. Easy To Install CO Alarm For Home. Travel Friendly, Portable. White with Test Button.
BLACK+DECKER

BLACK+DECKER Carbon Monoxide Alarm and Detector. 10 Year Battery Life With Built In Lithium Battery. Easy To Install CO Alarm For Home. Travel Friendly, Portable. White with Test Button.

Why we love it
  • Reliable detection of carbon monoxide.
  • Long-lasting 10-year battery life.
  • Easy installation for any home.
Main Highlights
  • CARBON MONOXIDE ALARMS FOR HOME: High quality electrochemical sensor detects dangerous levels of carbon monoxide (co), which alerts you with 4 loud 85db(a) (at 3 metres) chirps and a flashing red led light.
  • 10 YEAR SEALED LITHIUM BATTERY: The sealed, tamper proof 10 year lithium battery lasts the life of the alarm, the alarm will indicate when the alarm needs replacing.
  • ALARM MEMORY: If the co alarm activates in your absence, the alarm will continue to alert until there are safe levels of co. the red alarm indicator will continue to flash once every 4 seconds for 72 hours following activation to show co has been detected and the alarm has activated.
  • EASY SET UP GUIDE: Slide the alarm downwards onto the activation base plate and you will hear the alarm CHIRP once and flash 5 times. Press the test button then RELEASE after 3 SECONDS, the alarm will sound after releasing. The activation base plate must be inserted for the alarm to work whether free-standing or wall mounting. No wiring required, simply fixed to a wall or free standing in your home. discrete, modern design to fit into the look of the home.
  • SAFETY ASSURED: Trust Black+Decker quality with this Carbon Monoxide Alarm, certified to BS EN 50291-1:2018 and BS EN 50291-2:2019 and fully compliant with CE and UKCA standards. Perfect for home or leisure spaces.
8.7
Excellent
Amazon Logo
10
8.7
Excellent
Kidde 5DCO Digital Carbon Monoxide Alarm and Detector with AA Batteries - 10 Year Sensor Life Digital Display CO Alarm - 7 Year Warranty
Kidde

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

Why we love it
  • Compact and lightweight design.
  • Long-lasting sensor lifespan.
  • Clear digital CO level display.
Main Highlights
  • 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
8.7
Excellent
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Related Deals You Might Like for Carbon Monoxide Detector British Gas Approved

📊We scanned 297 products
🔍
We reviewed the most relevant Carbon Monoxide Detector British Gas Approved offers across Amazon and leading retailers, covering major brands and models. Our shortlist features trusted names like Fireangel, Kidde, Alertlink, Safeliveo, BLACK+DECKER, known for dependable quality and smart design.
⭐
To determine today's best Carbon Monoxide Detector British Gas Approved, we analysed 1486 real customer and expert reviews, focusing on satisfaction, real-world performance and long-term reliability. We also weigh each review's relevance, authenticity and freshness for a fair comparison.

What we concluded:

🏆 #1
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

Our overall winner is 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 by Fireangel. It stands out for the right balance of quality, performance and value.

✨ What sets it apart:
✓Alerts with flashing lights.
✓Test button ensures functionality.
✓Includes replaceable AA batteries
💎 Best Value
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

The best value for most shoppers is 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 by Fireangel, with consistently high satisfaction across expert and customer reviews.

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

The strongest deal right now for Carbon Monoxide Detector British Gas Approved is Kidde 5CO Carbon Monoxide Alarm and Detector with AA Batteries - 10 Year Sensor Life CO Alarm for Home at Kidde, currently at 32% off.

🔄Our Carbon Monoxide Detector British Gas Approved ranking is updated regularly to reflect new releases and price changes—check back for the latest picks and deals.