10 Best Carbon Monoxide Detector Approved in The UK

Last updated on 25/04/2025

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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 - 2-Pack - White

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Why We Love It

Rigorously tested and Kitemark certified.
Portable and versatile for travel.
Sealed, tamper-proof long-life battery.

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.

LSENLTY Upgraded Carbon Monoxide Detector Plug in Wall, Carbon Monoxide Detectors with HD Screen&Indicator Visual&Audible Alarm, 3-in-1 CO Detector(CO Gas Meter, Temp and Humidity) for Home RV Travel

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Why We Love It

Upgraded HD display enhances visibility.
Plug-in design ensures safety compliance.
Advanced sensor provides accurate readings.

Main Highlights

How do I set the carbon monoxide detector screen to rotate? : We have designed a screen display rotation function for the UK. You can rotate the screen display by simply pressing and holding the "bell" button.
【Upgraded HD Display】Not only can you view the carbon monoxide concentration value intuitively on the HD display, you can also clearly see the temperature and humidity conditions that you pay attention to daily, and say goodbye to the eye-catching small screen of the traditional carbon monoxide detector. You can clearly see the readings of carbon monoxide, temperature and humidity from multiple viewing angles.
【Comprehensive CO detector plug-in design】Carbon monoxide is harmful. When the carbon monoxide in the air exceeds the standard, it will cause harm to the human body and endanger life safety. This plug-in carbon monoxide detector is compatible with 230V AC power sockets. Suitable for all UK standard AC sockets such as bedrooms, RVs, kitchens, living rooms, basements, hotel rooms, etc.
【Advanced electrochemical sensor】When exposed to carbon monoxide, it immediately generates current, which means it responds faster and more accurately than traditional carbon monoxide detectors, and is not easily affected by other gases. Please note that it is normal for the product to display a reading of 000PPM when there is no carbon monoxide gas in the air.
【Thoughtful brightness design】You can choose high, medium, low and off screen brightness settings. The breathing light can also be turned off. Please rest assured that even when the breathing light or screen brightness is turned off, the product continues to detect the CO concentration value in the surrounding environment. Once it exceeds 50PPM, the carbon monoxide alarm indicator and screen will light up quickly, and an alarm sound of more than 85dB decibels will be issued to remind you.

3 Packs Carbon Monoxide Detector - AGSMXSYG Carbon Monoxide Alarms Battery Powered with Digital Display, CO Detectors Alarms Monitor for Home,RV & Kitchen

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Why We Love It

Sensitive sensor detects accurately.
Power-saving design enhances efficiency.
Intelligent recognition ensures safety.

Main Highlights

【Upgraded Sensitive Sensor】Advanced electrochemical sensor accurately detects carbon monoxide gas concentration.
【Power Saving Design】 Under normal conditions the green light flashes every 30 seconds without displaying PPM, this design is very power saving; and when carbon monoxide concentration is detected to reach the default value, the detector will display PPM, as well as an alarm prompt.
【Intelligent Recognition Detection】When the dangerous level is reached, the red LED light will flash, displaying PPM and emitting an 85dB alarm sound.
【Alarm Concentration Levels】30PPM to 50PPM - Alarm in 60 to 90 minutes; 100PPM - Alarm in 10 to 40 minutes; ≥200PPM - Alarm in 1 minute.
【Wide Range of Applications】Carbon monoxide detector is suitable for home, RV, kitchen, bathroom, etc.

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

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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.

DS-100 Portable Carbon Monoxide Detector for Travel, 140H Standby, CO Detector with Magnetic Back, Rechargeable 3-in-1 CO Monitor with Audible & Visual Alarm for Camping, Hotel, Car & RV

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Why We Love It

Portable and lightweight design.
Real-time temperature and humidity monitoring.
Long-lasting battery with fast charging.

Main Highlights

Carbon Monoxide Detector: The DS-100 is a 3-in-1 portable carbon monoxide detector that can detect carbon monoxide levels from 0 to 1000ppm, it will alert you when the concentration reaches 50 ppm. This allows you to detect and mitigate risks at low level carbon monoxide. It also measures temperature and humidity, enables you to observe temperature and humidity in real time, convenient for daily use
Large Capacity Battery: The CO detector features a powerful 1000mAh lithium battery with Type-C fast charging support, eliminating the need for frequent replacements and ensuring long-lasting operation. A single full charge lasts 140 hours, providing reliable safety during extended trips, making it an ideal travel companion
Easy to Carry: The CO Meter is designed to be compact and lightweight, measuring 7.6x6x3 cm, making it easy to fit into your luggage without occupying much space. The included lanyard allows for easy carrying, even when traveling light. Ensuring safety and peace of mind wherever your journey takes you
Audio-visual Alarm: Provides an audio-visual alarm function. In default mode, when the carbon monoxide concentration reaches and exceeds 50ppm, the screen's yellow or red indicator bars will flash, accompanied by a high-decibel alarm. As the carbon monoxide concentration increases, the alarm frequency accelerates, enabling you to promptly detect danger and protect yourself
What You Get: You will receive DS-100 Carbon Monoxide Detector, Type - C Cable, Outdoor Special Rope Buckle, User Manual

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

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Why We Love It

Ensures accuracy with reliable sensor.
Alarms loudly for safety.
Convenient battery life longevity.

Main Highlights

Accurate Relialbel CO Detector: Comply with EN 50291 standard, CE Certified Carbon Monoxide alarm, equipped with high accuracy and reliable electrochemical sensor, continuously measure CO concentration in ambient air.
Loud Alarm Warning: Carbon Monoxide can't be found with human natural senses. You can see real-time CO levels on LCD display. When a dangerous level of carbon monoxide is detected, the red LED will flash and the 85dB audible alarm will alert your families.
10 Year Battery Operated: The CO Alarm is equipped with 1600mAh Lithium battery (Sealed In). No wiring and sockets required. It can be placed anywhere you want.
Easy Intsalltion: The CO alarm can stand freely on the desk, also can be wall mounted with double side tape without drill, or drill to install with screw kits. With the bracket, the CO detector also can be taken down even wall mounted.
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.

HEIMAN Carbon Monoxide Alarm Detector EN 50291 Certified, CO Alarm Detector, 5-Year Replaceable Battery, 10 Year Sensor

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Why We Love It

Loud 85 dB alarm.
Easy wall installation.
LED status indicators.

Main Highlights

Features: Alarm signal volume: approx. 85 dB
Warning of carbon monoxide poisoning due to incomplete combustion (fireplace/gas boiler)
3 x status LED (green = power, yellow = error, red = alarm)
LED light with self-test function, test button for the test function of the CO warning detector, error warning in case of incorrect function, warning signal if the battery is too low.
Carbon monoxide CO detector with display and LED status display, certified and tested according to EN 50291.
Box contents: 1 x CO detector, 2 x 1.5 V DC batteries type AA, 2 x dowels, 2 x screws, 1 x instructions (English language not guaranteed)
Operating or storage temperature: -10 to +40 °C
Permissible humidity range: 20% - 95%
Easy installation (can be attached to the wall or on a flat surface)

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

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Why We Love It

EN 50291-1:2018 compliant security.
10-year sealed battery life.
Flexible and portable usage.

Main Highlights

✅EN 50291-1:2018: when purchasing a CO alarm, ensure that it is compliant with the most recent update standard EN 50291-1:2018, WOLF SHIELD CO-Alarm is approved according to EN 50291-1:2018, and British Standard has accepted this as well. This CO Alarm will make you feel comfortable, secure, and confident. It will also protect you and your family and alert you if the CO level rises.
✅SEALED IN 10-YEAR BATTERY LIFE: WOLF SHIELD Carbon Monoxide Alarm comes with a 10-year lithium battery and offers a 10-year life-time . There is no need for any kind of wire work, when using this WOLF SHIELD CO-Alarm. You will get a clear warning once the battery is on low status (near the end of 10 years), which means you need to replace the WOLF SHIELD CO Alarm with a new one.
✅Each is 7 centimeters by 7 centimeters tall, smaller than a human hand. Every room in his main room has a clean and tidy side to him Because of the built-in battery, there is no need for leaking wires. You can hang it anywhere you need it, at home, office, RV, or campsite You can rely on our cooperative alerts to protect your health and safety.
✅ INDICATOR LIGHTS: In a normal environment. No CO, it shows nothing and the green LED light flashing indicates that the unit is working properly. An active CO alarm ( from 50 PPM) , the red LED flashes, and the sound is as loud as 85 dB. The yellow LED light flashes means an error/fault;
✅Flexible Use - Our portable lithium battery CO alarm may be used in your house or brought with you when traveling. It is precise and long-lasting. It is compact and light enough to carry along. It may be used at home, at the office, in your tent or RV, and anywhere else where CO levels might be of any concern.

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

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Why We Love It

High accuracy and reliable.
Clear digital LCD display.
Long-lasting 10-year protection.

Main Highlights

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

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

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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

8.9

Excellent

We scanned 1054 products

We reviewed these offers relevant to the Carbon Monoxide Detector Approved within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like Fireangel, LSENLTY, AGSMXSYG, GasDoc, XINDUM, HEIMAN, WOLF SHIELD, Scondaor, Safelincs, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Carbon Monoxide Detector Approved in the market, we considered we took a deep dive into 5271 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

The clear winner of our analysis 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 - 2-Pack - White. We love many things about this product by Fireangel. What sets it apart from the competition is Rigorously tested and Kitemark certified, Portable and versatile for travel, Sealed, tamper-proof long-life battery.
The best value product for most shoppers and where user satisfaction is continuously the highest is LSENLTY Upgraded Carbon Monoxide Detector Plug in Wall, Carbon Monoxide Detectors with HD Screen&Indicator Visual&Audible Alarm, 3-in-1 CO Detector(CO Gas Meter, Temp and Humidity) for Home RV Travel by LSENLTY based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Carbon Monoxide Detector Approved and the best cost-to-value ratio is 3 Packs Carbon Monoxide Detector - AGSMXSYG Carbon Monoxide Alarms Battery Powered with Digital Display, CO Detectors Alarms Monitor for Home,RV & Kitchenat AGSMXSYG with a 38% discount.
Our list of the best Carbon Monoxide Detector Approved is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.

10 Best Carbon Monoxide Detector Approved in The UK

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We scanned 1054 products

We concluded that: