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Carbon Monoxide Detectors Comparison - April 2026
7 Best Carbon Monoxide Detectors In the UK
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant's customer service levels, popularity trends, and more. The rankings reflect our opinion and should be a good starting point for shopping. As an Amazon Associate we may earn from qualifying purchases. We may receive a commission from purchases made through links on our site, which will help us continue to provide you with value.
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Overview: Are you looking for a reliable way to protect your family and home from the danger of carbon monoxide poisoning? Carbon monoxide detectors are a must-have for any home, and there are many options for you to choose from. Read on for reviews of the best carbon monoxide detectors available today.
Twin Pack Kidde 5CO Battery Powered Carbon Monoxide Alarm and Detector - 10 Year Sensor Life with AA Batteries
Model
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
Model
FireAngel FA6812 Digital Carbon Monoxide Detector with LCD Screen, 10-Year CO Alarm Sensor, Portable Carbon Monoxide Alarm for Home, Travel, Caravan
Model
Kidde 5CO Carbon Monoxide Alarm and Detector with AA Batteries - 10 Year Sensor Life CO Alarm for Home
Model
FireAngel FA6812 Digital Carbon Monoxide Detector with LCD Screen, 10-Year CO Alarm Sensor, Portable Carbon Monoxide Alarm for Home, Travel, Caravan
Model
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
Model
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)
Brand
Kidde
Brand
Fireangel
Brand
Fireangel
Brand
Kidde
Brand
Fireangel
Brand
X-Sense
Brand
Fenary
Reviews
130,256 reviews
Reviews
24,580 reviews
Reviews
780 reviews
Reviews
130,256 reviews
Reviews
780 reviews
Reviews
316 reviews
Reviews
140 reviews
Features
Easy installation
9.9
Easy installation
9.8
Easy installation
9.6
Easy installation
9.9
Easy installation
9.4
Easy installation
9.3
Easy installation
9.1
Worth the money
9.8
Worth the money
9.6
Worth the money
9.4
Worth the money
9.8
Worth the money
9.3
Worth the money
9.1
Worth the money
9.1
Simple to use
9.9
Simple to use
9.9
Simple to use
9.8
Simple to use
9.9
Simple to use
9.4
Simple to use
9.3
Simple to use
9.1
Tech Specs
product dimensions
14.6 x 25.4 x 7.8 cm; 460 g
product dimensions
5 x 12.3 x 8 cm; 141 g
product dimensions
12 x 7.3 x 3.6 cm; 145 g
product dimensions
12.6 x 3.5 x 7.2 cm; 115 g
product dimensions
12 x 7.3 x 3.6 cm; 145 g
product dimensions
14.2 x 3.2 x 7.5 cm 180.5 g
product dimensions
10 x 1 x 10 cm 100 g
item weight
460 g
item weight
141 g
item weight
145 g
item weight
115 g
item weight
145 g
item weight
181 g
item weight
100 g
batteries included
Yes
batteries included
Yes
batteries included
Yes
batteries included
Yes
batteries included
Yes
batteries included
Yes
batteries included
No
batteries required
Yes
batteries required
Yes
batteries required
Yes
batteries required
Yes
batteries required
Yes
batteries required
Yes
batteries required
Yes
item package quantity
1
item package quantity
1
item package quantity
1
item package quantity
1
item package quantity
1
item package quantity
1
item package quantity
-
power source
Battery Powered
power source
Battery Powered
power source
Battery Powered
power source
Battery Powered
power source
Battery Powered
power source
Battery Powered
power source
-
style
Twin Pack
style
Single Pack
style
Digital Carbon Monoxide Detector with LCD Screen
style
Single Unit
style
Digital Carbon Monoxide Detector with LCD Screen
style
Standalone Model
style
-
battery cell type
Alkaline
battery cell type
Alkaline
battery cell type
Alkaline
battery cell type
Alkaline
battery cell type
Alkaline
battery cell type
Alkaline
battery cell type
-
included components
-
included components
Carbon Monoxide Alarm, 2 x AA Batteries, Manual
included components
Carbon Monoxide Alarm, 2 x AA Batteries, Manual
included components
2 x AA Batteries, 5CO Carbon Monoxide Alarm, Fixing Kit, User Manuals
included components
Carbon Monoxide Alarm, 2 x AA Batteries, Manual
included components
1 Carbon Monoxide Alarm, 2 x AA Batteries Pre-installed , 2 x Screws, 2 x Anchor plugs, 1 x Drill Hole Spacing Indicator Label, 1 User manual
Here are the top 3 recommended products with more information to help you find the right product for you
9.7
1
Kidde
15% Off
Twin Pack Kidde 5CO Battery Powered Carbon Monoxide Alarm and Detector - 10 Year Sensor Life with AA Batteries
9.9Easy installation
9.9Simple to use
9.8worth the money
Main highlights
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)
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
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
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
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
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9.6
2
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
9.9Simple to use
9.8Easy installation
9.6worth the money
Why we love it
Detects dangerous CO levels effectively.
Battery replacement is easy and convenient.
Portable for travel protection.
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.
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9.5
3
Fireangel
FireAngel FA6812 Digital Carbon Monoxide Detector with LCD Screen, 10-Year CO Alarm Sensor, Portable Carbon Monoxide Alarm for Home, Travel, Caravan
9.8Simple to use
9.6Easy installation
9.4worth the money
Why we love it
10-year sensor ensures long-term safety.
Portable design ideal for travel.
Easy-to-read LCD screen.
Main highlights
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.
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.
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.
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.
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Our ranking system
The topchoice.co.uk Team selects top-of-the-line items from a wide selection and conducts rigorous evaluations on almost all the products available on the internet. We rank each product based on how well it matches our criteria. We can ensure that the product is well-tested with the help of our expertise, experts, and artificial intelligence technology. topchoice.co.uk requires consistent care for the products we review, ensuring that our assessments are always accurate and up to date.
Features
Our team of experts analyzes key attributes, capabilities, significance, and many more depending on the type of product to determine its effectiveness.
Consumer Reviews
We ensure an evaluation of the ratings using references all over the internet for each product. With the help of our AI technology and professional review teams, we give weight to the worth of individual user experiences.
Popularity
Popularity is an important criterion in choosing a product. Several factors contribute to the popularity of the products on our site, including prestige, relevance, reputation, news, and more.
Value for money
topchoice.co.uk compares product attributes to price, examines tech specs, ratings and reviews, and more.
When compared to other criteria, does the pricing seem reasonable? In order to provide genuine value for money, our team must answer that question with advanced calculations.
Value for money
topchoice.co.uk compares product attributes to price, examines tech specs, ratings and reviews, and more.
When compared to other criteria, does the pricing seem reasonable? In order to provide genuine value for money, our team must answer that question with advanced calculations.
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9.9 
9.7
1Kidde15% Off
Detects dangerous CO levels effectively.
