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10 Best combined smoke and carbon monoxide alarm

Welcome to our top 10 product reviews for combined smoke and carbon monoxide alarm. We've scoured the market to bring you the best of the best, with products ranging from a 7.1 score up to a whopping 9.8 score!

Updated December 2025
2
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
9.6
Excellent

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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

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

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9.6
Excellent
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bestBest value
3
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
9.5
Excellent

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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

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.

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9.5
Excellent
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Why Trust One Clear Winner?

One Clear Winner spends thousands of hours researching, analyzing, and testing products to recommend the best picks for most consumers. We only make money if you purchase a product through our links, and all opinions about the products are our own.

About One Clear Winner

How We Tested

We recommend these products based on an intensive research process that's designed to cut through the noise and find the top products in this space. Guided by experts, we spend hours looking into the factors that matter, to bring you these selections.

Learn more about testing

51

Products Considered

62

Consumers Consulted

24

Hours Researched

Why Trust One Clear Winner?

One Clear Winner spends thousands of hours researching, analyzing, and testing products to recommend the best picks for most consumers. We only make money if you purchase a product through our links, and all opinions about the products are our own.

About One Clear Winner

How We Tested

We recommend these products based on an intensive research process that's designed to cut through the noise and find the top products in this space. Guided by experts, we spend hours looking into the factors that matter, to bring you these selections.

Learn more about testing

51

Products Considered

62

Consumers Consulted

24

Hours Researched

7
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
8.6
Good

Save £4.05

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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

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.

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8.6
Good
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