10 Best Carbon Monoxide And Smoke Detector in The UK

Last updated on 07/08/2025

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X-Sense Combination Smoke and Carbon Monoxide Alarm with LCD Display & 10-Year Battery, Smoke Alarm for Home Compliant with EN 14604 and EN 50291 Standards, SC07

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Why We Love It

Ultimate protection from deadly threats.
Continuous power for a decade.
Accurate, reliable threat detection.

Main Highlights

Attention: The SC07 Combination Smoke and Carbon Monoxide Alarm is not compatible with the SBS50 Base Station and does not support interconnectivity or any APP functionality
2-In-1 Protection: Equipped with both photoelectric smoke sensor and electrochemical CO sensors that work independently of each other, this smoke alarm and carbon monoxide detector instantly notifies you when dangerous smoke or CO concentration is detected while minimizing false alarms; provides the ultimate protection from 2 deadly threats, all contained in 1 unit
Built-In 10-Year Battery: Provides 10 years of continuous power with a built-in lithium battery, saving on energy while remaining eco-friendly; this smoke alarm and carbon monoxide alarm saves you from constantly having to change batteries or wonder if your alarm is still functioning
Accurate, Reliable & Highly Sensitive: The X-Sense combination smoke and CO alarm has been redesigned from the inside out; it will ensure that smoke triggers the alarm instead of interference by taking 3 separate smoke samples from the surrounding air; a full 360 ° ring of air intakes ensures complete detection with no blind spots
LED Indicator: Clearly informs you of the working status of the smoke alarm with its 3-color flashing LED indicator (green LED indicates normal operation, red LED indicates the alarm status, and yellow LED indicates a fault), ensuring the safety and security of your home 24/7
Large LCD Display: Clearly displays battery level and the real-time CO levels in PPM (parts per million) taken from the surrounding air, with an updated measurement taken every 10 seconds, ensuring you are always aware of the status of your carbon monoxide and smoke detector

FireAngel Combination Smoke and Carbon Monoxide Alarm for Home - SCB10-R, 10 Year Life, Dual Carbon Monoxide Detector and Smoke Alarm with Test and Hush Button - Combined CO and Fire Alarm - White

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Why We Love It

Quick detection of all dangers.
Audible warnings for safety.
Certified, long-life span product.

Main Highlights

DUAL PROTECTION: This combination carbon monoxide (CO) and smoke detector offers vital protection against both CO and fire risks. The CO sensor alerts you to invisible gas dangers, and the optical smoke sensor quickly 'sees' slow, smouldering fires.
10 YEAR BATTERY: Each 2 in 1 carbon monoxide and smoke alarm for home use comes with a 10 year sealed battery that lasts the alarm's lifetime. When the device needs replacing, it will ‘chirp’ twice and the amber LED will flash twice every 40 seconds.
ADVANCED DETECTION: The advanced optical sensing technology reduces nuisance smoke alarms by 'seeing' thick white smoke as it enters the alarm, while the advanced electrochemical CO sensing technology provides improved CO detection.
DISTINCT ALARM SOUNDS: The dual smoke and carbon monoxide alarm features clear visual indicators and separate alerts for each hazard, allowing you to easily identify the specific danger when the alarm sounds
POSITIONING: Suitable for the landing, hallway, bedroom, living room and dining room; aim to position the combined smoke alarm and carbon monoxide detector as close to the sleeping area as possible on the wall or ceiling.
SAFETY ASSURED: The SCB10-R FireAngel smoke alarm and CO monitor is Kitemark certified, and third-party approved by the British Standards Institute (BSI) to EN 14604:2005+AC:2008 EN 50291-1:2018. It includes a 3-year warranty.
FIREANGEL HOME SAFETY: In addition to our combination CO and smoke alarms for the home, we offer a wide range of other safety products designed to protect you and your family. Choose from smart devices, as well as standard smoke and heat alarms.

Kidde 10SCO Combination Smoke and Carbon Monoxide Alarm with Voice Notification

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Why We Love It

Ensures safety through testing.
User-friendly with clear instructions.
Engages proactive safety measures.

Main Highlights

Alarms should be tested by pressing the test button in accordance with the supplied instructions.
Reliable performance
The voice warnings given by this alarm are: "fire! Fire!" "Warning! Carbon monoxide" "Caution, carbon monoxide previously detected" "Hush mode activated" "Hush mode cancelled" "Low battery"
Designed to be wall- or ceiling-mounted, this battery-powered unit is ideal for when space is limited but protection is paramount. It can be used in most locations throughout the home but check in in-pack guidelines for specific installation instructions

Kidde 10SCO Combination 10 Year Life Carbon Monoxide and Smoke Alarm (1)

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Why We Love It

Space-saving with dual alarm feature.
Clear voice warnings provided.
Long-lasting with manufacturer's warranty.

Main Highlights

Two alarms in one unit for space saving and convenience.
Different voice warnings for smoke and CO with loud 85dB alarm noise.
Kitemarked and CE marked. 10 year sensor life and manufacturer’s warranty.
2 x AA alkaline battery included, must be replaced every 1 -2 years.
Supplied with fixings: 2 x screws and 2 x rawl plugs.

FireAngel Smoke and Carbon Monoxide Alarm 2-Pack - SB1-R Toast Proof Optical Smoke Alarm for Home and FA3313 10-Year Life Carbon Monoxide Detector with Replaceable Batteries - CO and Fire Safety Set

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Why We Love It

Protects against fire and CO.
Easy to use silencing feature.
Third party safety approved.

Main Highlights

HOME SAFETY SET: This essential 2-pack provides vital protection against carbon monoxide (CO) and fire risks in your home. The CO detector alerts you to invisible gas dangers, while the optical smoke alarm responds quickly to slow, smouldering fires.
EARLY WARNING SMOKE DETECTOR: The Toast Proof Smoke Alarm is less prone to false alarms. The optical smoke sensing chamber works by 'seeing' smoke as it enters the alarm, perfect for slow burning fires with thick white smoke.
ENHANCED CO SENSING: Designed with intelligent sensing technology, the CO alarm's high sensitivity mode activates when it predicts CO levels will increase to or above 180ppm, providing a quicker alert to ventilate.
REPLACEABLE BATTERIES: The SB1-R smoke detector includes a 1-year replaceable battery and a 3 year warranty. The FA3313 Fire Angel CO alarm comes with 2 x 1 year replaceable AA batteries and a 5 year warranty.
ADDITIONAL FEATURES: You can mute the FA3313's low battery warning for 8 hours by pressing the test button whilst the amber light continues to flash. For a false smoke alarm, hold the SB1-R test button for 5 seconds to silence it for 8 minutes.
SAFETY ASSURED: The FA3313 CO monitor holds CE and UKCA marks and is certified to BS EN 50291-1:2018 and BS EN 50291-2:2019. The SB1-R alarm holds both CE and UKCA marks and is certified to BS EN 14604:2005. Suitable for homes in England and Wales.
FIREANGEL HOME PROTECTION: In addition to our CO and smoke alarms 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 kitchen heat alarms.

Meross Carbon Monoxide Detector, Dual Sensor Smoke and Carbon Monoxide Alarm, Smoke Alarm for Home with Test/Silence Button, 10-Year Battery Smoke Alarm, 85dB Fire Alarm, EN 14604 & EN 50291 Standard

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Why We Love It

Dual sensor for safety.
Long-lasting 10-year battery.
Easy installation and usage.

Main Highlights

2-in-1 Function: The photoelectric smoke detector and electrochemical CO sensor work independently of each other. If the carbon-monoxide-detector detects both smoke and carbon monoxide, it sounds first for smoke and then for CO. The CO detector detects both fast and slow-burning fires, minimising false alarms.
10-Year Service Life: The smoke alarm and carbon monoxide detector contains one built-in 3V CR123A battery (not removable) that can last 10 years. You can avoid the trouble of replacing the battery, and it ensures your carbon monoxide alarm is always ready to protect.
User-Friendly Design: The light and simple white round design ensures the carbon monoxide detector blends seamlessly into your home. The carbon monoxide and smoke detector includes a test/silence button (please press the test button monthly to confirm the working status of the smoke alarm). The fire alarm sound is over 85dB at 3 metres and sounds throughout your home; press the test button to silence.
High-Tech: This carbon monoxide and smoke detector has an inbuilt smart chipset. The carbon monoxide alarm is automatically activated when it is attached to the bracket. The LED light is normally green and turns red in an emergency. The smoke alarm for home complies with EN 14604 and EN 50291 standards to ensure reliable quality.
Easy Installation: The battery-operated smoke detector (not wired) can be installed by yourself in 5 minutes without the need for an electrician. The CO alarm is easy to mount on any wall or ceiling with the included screws. Note: Carbon monoxide is lighter than air, so it is recommended to install it at a distance of 30 cm from the ceiling.

Putogesafe Smoke-CO Detector with LCD Display, Combined Smoke and Carbon Monoxide Detector with Replaceable Battery, 2-in-1 Smoke Detector, 10 Years Lifetime, GS888, 1 pack

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Why We Love It

Reliable smoke and CO detection.
Practical and informative LCD display.
Long battery life and flexibility.

Main Highlights

[2-in-1 Protection] The combined smoke and co detector is equipped with a photoelectric smoke sensor and an electrochemical co-sensor that detects both smoke and dangerous co-values and provides reliable protection your family can rely on.
Practical LCD display: This combined smoke and carbon monoxide detector features an easy-to-read LCD display that shows the alarm status and battery level, so you can see at a glance how high the CO levels are in the environment and occur in real time.
[Replaceable batteries] The carbon monoxide detector has a service life of up to 10 years, with 3 replaceable AA batteries, a battery life of up to 7 years, more flexibility when replacing and less risk of battery leaks
[Three alarm modes] 85dB buzzer, LCD and LED warning. When the smoke detector detects a dangerous situation, a buzzer sounds, a red indicator light flashes quickly and a warning symbol appears on the LCD screen
[Mute Mode] Press the test/mute button when the smoke detector is in a low power warning state. The alarm remains silent for about 10 hours. With this smoke and co detector, you don't have to worry about your privacy.
Automatic smoke detection: The smoke detector has optical sensors that can distinguish between particles of different sizes to detect the type of smoke, e.g. light smoke from boiling or heavy smoke in the event of a fire outbreak. By detecting the type of smoke, false alarms are reduced and ensures that the detector is only triggered when there is actually a danger.

X-Sense Combination Smoke and Carbon Monoxide Alarm with English Voice Alerts, Smoke Alarm for Home with Replaceable Battery, XP0A-SR, 1-Pack

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Why We Love It

Clear audio-visual warning system.
Minimal design fits anywhere.
Reliable with long lifespan.

Main Highlights

Important Note: The XP0A-SR Combination Smoke and Carbon Monoxide Alarm does not support interconnectivity or app functionality. It is designed to operate as a standalone device
English Talking Alarm: Immediately understand the danger thanks to an English voice alert that sounds in conjunction with the siren; the built-in speaker delivers warnings specific to the detected danger type, such as "Warning! Smoke detected. Evacuate." or "Warning! Carbon monoxide detected. Move to fresh air."
Easier Means Safer: Handy voice alerts keep you easily and quickly informed of important information such as emergencies, battery status, faults and lifespan; LCD screen displays a real-time carbon monoxide measure, battery status and other information; understand what’s going on without digging out the manual so you can take action quicker and keep your family safer
2-in-1 Protection: Get full protection from a single smoke alarm and carbon monoxide detector—the photoelectric and electrochemical CO sensors which work independently to instantly warn you of dangerous smoke or CO levels; keeps your family protected against 2 deadly threats with less hassle
Sleek Design: Only 30 mm thick, this ultra-thin fire alarm and carbon monoxide detector blends in anywhere; the 135 mm diameter mounting bracket perfectly covers the hole left by your old alarm
10-Year Lifespan:Fire-retardant ABS material and 10-year sensor life offer reliable performance for up to 10 years; the replaceable CR123A battery lasts up to 5 years

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.

Combination Smoke and Carbon Monoxide Alarm Detector,Dual Sensor Smoke Alarm and Carbon Monoxide Detector and Replaceable Battery Smoke and CO Alarm for Your Home, Garage, Office (2 Pack)

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Why We Love It

Dual threat protection offered.
Easy installation process available.
Reliable digital display indicates status.

Main Highlights

【2 in 1 Carbon Monoxide and Smoke Detector】 Protection from two deadly threats, The alarm protects against both dangerous smoke and carbon monoxide (CO) in the surrounding air; accurately detects CO from any potential sources. When carbon monoxide and smoke rise to alarm levels, the alarm provides a clear, loud warning when it is discovered. Bring you double protection from Uninterrupted 24/7 protection & large detection range.
【Meet the Latest EN 50291-1:2018】 Our products are updated closely according to The Smoke and Carbon Monoxide Alarm (England) Regulations 2015, label with the document code “EN 50291-1:2018” released by TUV. This fire alarms for home features the latest photoelectric sensor and intelligent chipset to quickly and accurately detect dangerous smoke levels, the smoke and carbon monoxide alarm 2 pack will beep. Building to offer you every potentially life-saving second.
【Quick & Easy Installation】 Battery (2*AA) operated device can be simply installed and maintained without the need for an electrician, carbon monoxide smoke detectors is easy to mount on any wall or ceiling with the included screws. You can hear the low power alarm when the power is close to run out, and won’t miss the chance to change the new battery. Note: (not supplied the batteries.Carbon monoxide is lighter than air, it is recommended to install it at a distance of 30cm from the ceiling.
【LCD Digital Displays】It is accurate ,reliable,highly sensitive. You can use the digital display to see the current CO concentration and the status of the machine's battery level. When carbon monoxide and smoke produce, the Combination smoke & carbon monoxide detectors will Instantly alerting you via an 85-dB alarm and a rapid-flashing LED indicator; the LED indicator won’t disturb your sleep when the alarm is in normal working status.
【Test Mode Button】Carbon monoxide and smoke alarm has self-check function. It allows you to easily know the working status of the alarm. And test button enables (silent mode)you to test the alarm weekly, When encountering a non-emergency situation（false alarms occur),you can immediately press the test button and the LED light will flash cyclically, indicating that it has entered the silent mode.

8.7

Excellent

We scanned 579 products

We reviewed these offers relevant to the Carbon Monoxide And Smoke 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, Fireangel, Kidde, Safelincs, meross, Putogesafe, Generic, 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 And Smoke Detector in the market, we considered we took a deep dive into 2896 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 Combination Smoke and Carbon Monoxide Alarm with LCD Display & 10-Year Battery, Smoke Alarm for Home Compliant with EN 14604 and EN 50291 Standards, SC07. We love many things about this product by X-Sense. What sets it apart from the competition is Ultimate protection from deadly threats. , Continuous power for a decade. , Accurate, reliable threat detection.
The best value product for most shoppers and where user satisfaction is continuously the highest is FireAngel Combination Smoke and Carbon Monoxide Alarm for Home - SCB10-R, 10 Year Life, Dual Carbon Monoxide Detector and Smoke Alarm with Test and Hush Button - Combined CO and Fire Alarm - White by Fireangel based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Carbon Monoxide And Smoke Detector and the best cost-to-value ratio is FireAngel Smoke and Carbon Monoxide Alarm 2-Pack - SB1-R Toast Proof Optical Smoke Alarm for Home and FA3313 10-Year Life Carbon Monoxide Detector with Replaceable Batteries - CO and Fire Safety Setat Fireangel with a 30% discount.
Our list of the best Carbon Monoxide And Smoke 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 And Smoke Detector in The UK

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We scanned 579 products

We concluded that: