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10 Best carbon monoxide detectors british gas

Welcome to our top 10 product reviews for carbon monoxide detectors british gas. We've scoured the market to bring you the best of the best, with products ranging from a 7.1 score up to a whopping 9.8 score!

Updated December 2025
2
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
9.6
Excellent

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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

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 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.

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9.6
Excellent
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5
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
9.1
Very Good

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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

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.

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9.1
Very Good
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Why Trust One Clear Winner?

One Clear Winner spends thousands of hours researching, analyzing, and testing products to recommend the best picks for most consumers. We only make money if you purchase a product through our links, and all opinions about the products are our own.

About One Clear Winner

How We Tested

We recommend these products based on an intensive research process that's designed to cut through the noise and find the top products in this space. Guided by experts, we spend hours looking into the factors that matter, to bring you these selections.

Learn more about testing

51

Products Considered

62

Consumers Consulted

24

Hours Researched

Why Trust One Clear Winner?

One Clear Winner spends thousands of hours researching, analyzing, and testing products to recommend the best picks for most consumers. We only make money if you purchase a product through our links, and all opinions about the products are our own.

About One Clear Winner

How We Tested

We recommend these products based on an intensive research process that's designed to cut through the noise and find the top products in this space. Guided by experts, we spend hours looking into the factors that matter, to bring you these selections.

Learn more about testing

51

Products Considered

62

Consumers Consulted

24

Hours Researched

6
Carbon Monoxide Detector, 10 Years Battery Carbon Monoxide Alarm, CO Alarm with Test/Silence Button,Carbon-Monoxide-Detector Comforms to EN 50291 Standard
8.8
Good

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Carbon Monoxide Detector, 10 Years Battery Carbon Monoxide Alarm, CO Alarm with Test/Silence Button,Carbon-Monoxide-Detector Comforms to EN 50291 Standard

Main Highlights

【Accurate and Reliable】- This CO alarm is equipped with a 10-year sensor that can give a high and stable performance of accurate CO detection and ensures few false alarm.

【10-Year Battery Life】- The carbon monoxide detector comes with a replaceable battery of 10-year that will keep your home continous protection. No need for frequent battery changes.

【Effective Notification】- This CO detector is designed with three-colour LED indicators. The LED light flashed green, yellow, red to indicate power on, fault and alarm.

【Loud and Clear Alarm】- The CO detector features a high-volume buzzer with sound output of 85dB at 3 meters. So that you and your family would not miss any alert.

【Easy&Flexible Installation】- It can be easily mounted on the wall by attached self-adhesive sticker or screws. Also you can let it free-standing by your choice.

【Quality Assurance】- The carbon monoxide detector is tested and certificated by TUV laboratory and meets EN 50291 standard.

【Usage Scenario】- Carbon monoxide is a gas produced by insufficient combustion, so it is essential to install carbon monoxide detectors around barbecues, fireplaces, etc.

【Warning】- This product is not a natural gas detector, not a methane detector, it detects carbon monoxide and can only be used indoors.

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8.8
Good
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8
Carbon Monoxide Detectors,Carbon Monoxide Alarm With LED display, CO Alarms Monitor for Home Safety,Comply with EN50291 Standard (AA Battery NOT Included) (01-white)
8.4
Good

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Carbon Monoxide Detectors,Carbon Monoxide Alarm With LED display, CO Alarms Monitor for Home Safety,Comply with EN50291 Standard (AA Battery NOT Included) (01-white)

Main Highlights

[Carbon Monoxide Alarm] This advanced carbon monoxide detector is equipped with a sensitivity electrochemical sensor to accurately and continuously monitor carbon monoxide levels. It is also equipped with an LED display for easy-to-read values (ppm). When the concentration exceeds a certain level, the alarm sounds and the red light flashes, and a buzzer sounds as a warning. You can quickly and clearly understand the concentration of PPM and take corresponding measures, which can effectively protect your personal and property safety. To ensure complete protection, be sure to place one on every level of your home and inside each bedroom.n Monoxide Detector

[Easy to install] This CO alarm is powered by 3*1.5V AA batteries (not included), not affected by power failure, low current consumption, long standby time, it is easy to install this carbon monoxide detector, no special tools are required. Just mount it on the wall or ceiling and it's ready to use. Its compact size and sleek design allow it to blend seamlessly with any home decor.

[Alarm standard] The alarm time depends on the carbon monoxide concentration level: 50ppm, alarm within 60 to 90 minutes; 100ppm, alarm within 10 to 40 minutes; 300ppm, alarm within 3 minutes. Note: When testing the detector, do not use gas to blow directly into the hole.

[Using Simple Carbon Monoxide Alarm] With just one test/reset button, when dangerous levels of carbon monoxide are detected, the red LED will flash and a loud alarm mode will sound - 85 decibel loud alarm with LED flashing. LCD displays real-time Co levels starting from 000 to page 999. When synergy readings are above 30ppm, the blue backlight turns on and displays real-time levels.

[Buy with confidence ]all our carbon monoxide alarms are rigorously tested and comply with CE EN50291 standards. If you have any questions about carbon monoxide detectors, You are welcome to connect with us. we promise and guarantee customer service to provide you with a reply within 24 hours.

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8.4
Good
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9
Carbon Monoxide Detector, Carbon Monoxide Alarm, Detector with LED Display (PPM Value Visible at All Times) and 85 dB Audible and Visual Alarm.
8.2
Good

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

Main Highlights

【Mini Carbon Monoxide Detector】is equipped with an LCD display for easy real-time reading of values (ppm) and audible and visual alarms. When the concentration exceeds a certain level, the alarm sound and red light will flash. You can quickly and clearly understand the PPM concentration and take appropriate measures to effectively protect your personal and property safety.

【Carbon Monoxide Alarm】When the carbon monoxide concentration reaches 100ppm, the alarm will be activated immediately, the red LED will flash and the buzzer will be triggered at the same time.85dB high pitch can get your attention faster. (Note: short press once can manually turn off the alarm sound)

【Carbon Monoxide Alarm Widely Used】 Adopting high-precision electrochemical sensor, it can quickly detect carbon monoxide gas. Can be used in kitchen, bedroom, bathroom, garage, RV, camping and other places. It has passed EN50291 safety certification, reliable quality.

【How to Use Carbon Monoxide Alarm】Powered by 3 AAA batteries, it will automatically turn on after loading the batteries, and then enter 30 seconds countdown, then enter the working mode, the PPM value is visible at any time. No any operation background light will go out, but the screen value is long bright, convenient for you to check the PPM value at any time.

【Alarm self-test】To test whether the product is effective or not, You can short press the button twice for self inspection If the screen does not show the value, it means that the battery power has been exhausted, remind you to replace the battery in time (Note: the battery can standby for 10 months, the sound and light alarm will lead to rapid loss of power).

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8.2
Good
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10
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)
8.1
Good

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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)

Main Highlights

Advanced CO Detection: Equipped with an advanced electrochemical sensor,This carbon monoxide detector detects dangerous levels of carbon monoxide (CO) in your home. Upon detecting hazardous CO concentrations, the alarm emits a loud sound (85 dB at 3 meters) alongside a flashing red ‘CO’ LED light.

Portable Carbon Monoxide Detector: Measuring 123 x 70 x 25 mm, this compact,free standing CO Detector with 1PCS double-sided adhesive is easy to carry and provides protection wherever you go. It also includes an integrated mounting bracket and screws for easy wall mounting.

Intuitive LED Indicators: The CO alarm has 3 LED indicators that provide clear information about its working status. The green LED indicates normal operation (30-second flashing green light), the red LED indicates alarm (CO alarm flashes red light and has a warning Alarm) and low battery reminder (low battery flashes red light but no sound), and the yellow LED indicates fault (flashing yellow light).

Alarm Memory: Your CO alarm device will notify you of a CO alarm when you are away. If not silenced, the alarm will continue to sound until CO levels reach a safe level. The red "CO" light will continue to flash as a visual indication of previous activation.Please press the Test Slience key to let the alarm slient.

Sensitive sensing: The digital LCD display shows various real-time carbon monoxide concentrations ranging from 000 to 999PPM, the blue words light up automatically, and the display shows that the concentration exceeds 30ppm; 50ppm, alarm within 60 to 90 minutes; 100ppm, alarm within 3 minutes; 300ppm, alarm within 3 minutes. Note: When testing the detector, do not use gas to blow directly into the hole.

How to use the carbon monoxide alarm, It is powered by 3 AAA batteries(Not included the batteries). After the batteries are installed, it automatically turns on, then enters a 30-second countdown and enters the working mode. The PPM value can be seen at any time. The Indicator light and PPM number light will go out without any operation,But the green LED flashes once every 30 seconds to indicate normal operation.

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8.1
Good
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