10 Best Smoke Alarm And Co2 Detectors For Home in The UK

Last updated on 26/08/2025

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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

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

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.

Kidde 10SCO Combination Smoke and Carbon Monoxide Alarm with Voice Notification and Alarm - Dual CO Detector and Fire Alarm with 10 Year Sensor Life - 10 Year Warranty

5% Off

Why We Love It

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

Main Highlights

DUAL PROTECTION: Two detectors combined into one space-saving unit; the Kidde 10SCO provides vital protection against carbon monoxide (CO) and fire risks in a single detector
10 YEAR WARRANTY: Backed by a comprehensive 10 year manufacturer's warranty for complete peace of mind that your alarm will provide reliable ongoing protection
VOICE ALERTS & ALARM: "Fire Fire" or "Warning! Carbon Monoxide!" voice alerts combined with an 85dB sounder provide an audible warning and clear indication of which danger has been detected
BATTERY POWERED: Powered by 2 x AA replaceable alkaline batteries (included). The easy to access front battery compartment makes replacing batteries quick and simple
EASY TO INSTALL: Designed to be wall or ceiling mounted, the 10SCO is ideal for when space is limited but protection is paramount; It can be used in most locations throughout the home (refer to included installation instructions)
SAFETY APPROVED: CE and UKCA marked, and Kitemarked to the most up-to-date British Standards for smoke alarms (BS EN 14604:2005) and carbon monoxide alarms (BS EN 50291-1: 2018). Suitable for BS 5839-6: 2019 Grade F2 installations

X-Sense Smoke and Carbon Monoxide Detector Wired Combination Smoke and CO Alarm Interconnected with Replaceable Backup Battery, XP04, 1 Pack

Why We Love It

Advanced sensor technology ensures safety.
Reliable power with battery backup.
Interconnects enhance home protection.

Main Highlights

MORE ACCURATE WITH SMART TECHNOLOGY - This wired smoke and carbon monoxide alarm combines an advanced photoelectric smoke sensor and Figaro CO electrochemical sensor to quickly detect smoking fire smoke and dangerous CO levels
Wired Alarm with Replaceable Backup Battery This combination of smoke and carbon monoxide alarm is AC wired with a 9V battery backup, so the alarm can continuously monitor smoke and CO even in the event of a power failure
Interconnects up to 18 units for full coverage: you can connect up to 18X-Sense wired alarm 2 in 1, so when an alarm is turned on, everything will ring together throughout your home
EASY INSTALLATION All mounting accessories are included for quick and easy installation in minutes
PREMIUM QUALITY - Made with high quality materials and components, this wired combo alarm provides a long service life of up to 10 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.

Smoke Alarm and Carbon Monoxide Detector, Smoke Alarm and CO Alarms Battery Powered with LCD Digital Display and Sound Alarm, EN 50291 CO Monitor for Home Safety

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Why We Love It

Effective carbon monoxide detection.
Audible and visual alerts.
Hassle-free installation process.

Main Highlights

Reliable Detection: This carbon monoxide detector conforms to the EN 50291 standard, ensuring accurate and reliable detection of dangerous CO levels.
Audible Alarm: In case of elevated CO levels, the detector emits a loud audible alarm to alert you and your family, ensuring your safety.
Audible Alarm: In case of elevated CO levels, the detector emits a loud audible alarm to alert you and your family, ensuring your safety.
Compact Design: Featuring a sleek and compact design, this CO detector blends seamlessly into any interior décor without compromising on functionality.
Easy Installation: With a straightforward setup process, this CO detector can be easily installed in any room or area where potential CO leaks may occur.

FireAngel Optical Smoke Alarm 2-Pack - FA6620 10-Year Battery Smoke Alarms for Home with Test/Silence Button - Replacement for FireAngel ST-622/ST-620 - Early Smoke Detector Fire Alarm - White

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Why We Love It

Fits existing baseplates for ease.
Rapid smoke detection feature.
Long-lasting, tamper-proof batteries.

Main Highlights

SMOKE DETECTORS FOR HOME: The optical smoke alarm makes protecting your home simple. Its optical sensing chamber 'sees' smoke as it enters the alarm, providing a fast response to slow burning fires with thick white smoke.
FEWER NUISANCE ALARMS: The advanced optical sensor ensures the FireAngel smoke alarm is less prone to false alerts from cooking fumes. Avoid placing near bathrooms or kitchens.
10-YEAR BATTERY: Each smoke alarm is fitted with a 10-year sealed battery, offering protection for the lifetime of the device without needing to change the batteries.
EASY INSTALLATION: Fitted with a removable base plate, secure it to the ceiling using the screws provided. Push and twist to secure the device. The base plate is identical to the ST622, making replacements quick and easy.
SAFETY ASSURED: The FA6620 smoke alarm holds CE and UKCA marks and is certified to BS EN 14604:2005+AC:2008. Suitable for domestic premises, including leisure accommodation vehicles, it comes with a 5-year warranty.

8.7

Excellent

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We scanned 846 products

We reviewed these offers relevant to the Smoke Alarm And Co2 Detectors For Home 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, Yezala, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Smoke Alarm And Co2 Detectors For Home in the market, we considered we took a deep dive into 4231 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 English Voice Alerts, Smoke Alarm for Home with Replaceable Battery, XP0A-SR, 1-Pack. We love many things about this product by X-Sense. What sets it apart from the competition is Clear audio-visual warning system. , Minimal design fits anywhere. , Reliable with long lifespan.
The best value product for most shoppers and where user satisfaction is continuously the highest 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 by X-Sense based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Smoke Alarm And Co2 Detectors For Home and the best cost-to-value ratio 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, SC07at X-Sense with a 34% discount.
Our list of the best Smoke Alarm And Co2 Detectors For Home 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 Smoke Alarm And Co2 Detectors For Home in The UK

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We scanned 846 products

We concluded that: