10 Best Carbon Monoxide Detector in The UK

Last updated on 29/08/2025

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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

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Why We Love It

10-year reliable protection.
Versatile placement options.
Sleek and compact design.

Main Highlights

10-Year Lifespan: Protect your loved ones from the silent threat of carbon monoxide for an entire decade with this reliable 10-year CO sensor; powered by replaceable AA batteries that last 3 years
Versatile Placement Options: This carbon monoxide detector's freestanding design allows you to place it on any flat surface, such as a desk, bookshelf, or bedside table; screws are also included to mount it on the wall
Sleek and Compact: Measuring just 75 × 142 × 32 mm, this small and unobtrusive carbon monoxide alarm looks good in any room, meaning you never have to compromise style for safety
Intuitive to Use: Easily use this alarm even in urgent situations thanks to its simple, size-differentiated buttons; enjoy reliable access to critical functions like checking the peak CO levels or testing/silencing the alarm
Easy to Understand: See the current CO level on a clear display; a tri-color LED tells you the alarm’s status at a glance: red for alarm, yellow for fault or low battery, and green for working normally

MOES Carbon Monoxide Detector with Temperature & Humidity Display - 85dB Alarm, 2" HD Screen, Auto-Rotate Display, UK Plug, High Precision CO Sensor for Home Safety

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Why We Love It

Advanced safety for your family.
Loud alarm ensures immediate attention.
Compact and easy installation.

Main Highlights

Advanced Multi-Function Detection System - Professional-grade carbon monoxide sensor with integrated temperature and humidity monitoring provides comprehensive air quality protection for your home. High-precision sensing technology ensures accurate readings and reliable detection to keep your family safe around the clock
Powerful 85dB Audio Alert with Manual Override - Loud 85-decibel alarm system provides unmistakable warning signals that can be heard throughout your home. Features convenient manual alarm dismissal function, giving you control while maintaining essential safety monitoring capabilities
Smart 2-Inch High-Definition Display - Crystal-clear 2-inch wide screen delivers precise, easy-to-read measurements with exceptional detail. Intelligent auto-rotate feature allows 180-degree display flip based on outlet orientation, ensuring optimal readability regardless of installation position
Customizable Display Settings - Three adjustable brightness levels let you optimize screen visibility for any lighting condition, from bright daylight to nighttime use. Complete screen-off option available for bedrooms or areas where display light may be unwanted while maintaining full monitoring function
UK Plug Ready Installation - Equipped with standard UK plug for immediate use in British electrical outlets. No complex installation required - simply plug in and start monitoring. Compact design fits seamlessly into any room without blocking adjacent outlets or taking up valuable space

2 Pack Carbon Monoxide Detectors - Carbon Monoxide Alarm Battery Powered, CO Detectors with Digital Display for Home, Easy to Install

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Why We Love It

Power saving mode extends battery life.
Sensitive sensor ensures accurate detection.
Quick alarm alerts to danger.

Main Highlights

【Awatin Carbon Monoxide Detector Power Saving Design】When there is no carbon monoxide gas in the environment, the device will automatically turn on the power saving mode, the display goes off, and the frequency of changing batteries will be much lower.
【Imported Sensor】Advanced sensitive electrochemical sensor, accurately detects carbon monoxide gas.
【Quick Alarm】When carbon monoxide concentration is detected to reach a dangerous level, the red LED light will flash and an 85dB alarm sound will be emitted.
【Alarm Concentration Criteria】30PPM to 50PPM - Alarm within 60 to 90 minutes; 100PPM - Alarm within 10 to 40 minutes; ≥200PPM - Alarm within 1 minute.
【Applicable Places】Carbon monoxide detector is suitable for home, kitchen, restaurant, hotel, office.

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

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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 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.

AEGTEST AGT-2309 Portable Carbon Monoxide Detector, 15-Day Standby, Rechargeable Mini CO Monitor with Lanyard for Travel & Camping, Handheld CO Meter with Audible & Visual Alerts, 0-1000ppm - Gray

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Why We Love It

Fast response time for safety.
Long battery life for convenience.
Portable design for easy travel.

Main Highlights

Carbon Monoxide Detector: The AGT-2309 is a portable carbon monoxide detector designed for long-term monitoring of carbon monoxide concentrations in the air. It can detect CO levels from 0 to 1000 PPM and is equipped with a high-precision sensor that responds in just 0.3S, providing timely protection for your safety
Long Standby Time: The handheld travel CO monitor operates efficiently in standby mode, conserving power effectively. It provides continuous usage for over 15 days (360 hours) and supports Type-C charging, eliminating the hassle of buying batteries. Convenient and ready for use at home, during travel, or while camping
Portable Design: This CO meter portable features a compact and lightweight design, making it easy to carry and reducing your travel burden. It also comes with a stand and lanyard, perfectly suited for various environments and placement needs, making it an ideal companion for home and travel
Smart Alerts and Easy Operation: When CO levels reach the alarm threshold, the breathing light turns red, a flame icon appears, and an alarm sounds, providing clear alerts. In standby mode, a green breathing light flashes to show normal operation. The three simple buttons are intuitive and easy to use, with no learning curve
What You Get: You will receive one AGT-2309 carbon monoxide detector, one Type-C cable, one lanyard, and a user manual. Our AGT-2309 has undergone rigorous quality inspection and factory calibration, with relevant reports issued by nationally certified laboratories, ensuring peace of mind during use

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

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Why We Love It

Reliable 10-year sensor technology.
Clear LCD display for alerts.
Includes batteries for convenience.

Main Highlights

CARBON MONOXIDE ALARM: The 10-year electrochemical sensor detects dangerous carbon monoxide (CO) levels, alerting with 4 loud chirps and a flashing red light. With no intervention, it switches to Alarm in Absence mode, chirping until deactivated.
LCD SCREEN: The LCD screen displays standby mode for current CO levels, active CO alarm, ‘AL’ alarm in absence, battery status, and ‘EOL’ end of life alert to indicate when the device needs to be replaced.
BATTERIES INCLUDED: Each CO monitor comes with 2 replaceable AA batteries. A flashing amber ‘!’ and continuous chirping indicate a low battery. Replace the batteries to stop the warning.
TRAVEL CARBON MONOXIDE DETECTORS: Each portable, free standing device measures 120 x 73 x 35.5 mm and includes an integrated mounting bracket and screws for optional wall mounting.
SAFETY ASSURED: The FA6812 Fire Angel carbon monoxide alarm is CE marked and complies with the standards BS EN 50291-1:2018 and BS EN 50291-2:2019.

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

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Why We Love It

Clear, loud CO alarm.
Compact and sleek design.
Certified and tested quality.

Main Highlights

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

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

39% OffFree Shipping

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.

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

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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

Firehawk Safety Products

Firehawk SML CO7B-10Y, White

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Why We Love It

Long-lasting sealed Lithium battery.
End of life indicator present.
Compact design with LED indicators.

Main Highlights

Sealed 10 year Lithium battery
End of life indicator
LED indicators
Versatile mounting system
Compact & stylish design

9.2

Superb

We scanned 639 products

We reviewed these offers relevant to the Carbon Monoxide Detector 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 X-Sense, MOES, Awatin, Fireangel, AEGTEST, Kidde, XINDUM, Safelincs, Firehawk Safety Products, 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 in the market, we considered we took a deep dive into 3196 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 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. We love many things about this product by X-Sense. What sets it apart from the competition is 10-year reliable protection. , Versatile placement options. , Sleek and compact design.
The best value product for most shoppers and where user satisfaction is continuously the highest is MOES Carbon Monoxide Detector with Temperature & Humidity Display - 85dB Alarm, 2" HD Screen, Auto-Rotate Display, UK Plug, High Precision CO Sensor for Home Safety by MOES based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Carbon Monoxide Detector and the best cost-to-value ratio is 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 Packat XINDUM with a 39% discount.
Our list of the best Carbon Monoxide Detector 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 in The UK

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We scanned 639 products

We concluded that: