Best Smoke & Carbon Monoxide Alarms — 2 years (2026)
2 smoke & carbon monoxide alarms matching warranty “2 years”, hand-picked from UK Amazon listings.
Not sure which one to pick? Read our Kidde 7DCOC Carbon Monoxide Alarm, White vs FireAngel FA6120-INT-T2 Smoke Alarm Detector, White: Which Smoke & Carbon Monoxide Alarms Is Better? guide.
#1 Pick
FireAngel FA6120-INT-T2 Smoke Alarm Detector, White- Standalone
- 2 years
Currently unavailable
Pros
- Optical sensor detects smouldering fires quickly
- Simple test/hush button for false alarms
- Kitemarked to British Standards
Cons
- Standalone unit, no wireless interlink with other alarms
£18.25
Pros
- Digital display shows live CO readings
- Loud 85dB alarm with test button
- Trusted long-standing safety brand
Cons
- Requires AA batteries, not sealed for 10-year life
These two carbon monoxide alarms offer comprehensive protection for your home, backed by a reassuring two-year warranty. Designed to detect dangerous levels of CO – often called the ‘silent killer’ – these alarms provide early warning and can significantly reduce the risk of serious illness or fatality. They feature highly sensitive sensors and clear digital displays, ensuring accurate readings and easy interpretation.
The detectors are fully compliant with UK regulations for carbon monoxide monitoring and are ideal for flats, houses, and other dwellings. Each alarm has a battery-powered operation, maintaining functionality during power outages – a crucial safety feature. The included mounting kit makes installation straightforward, and the alarms are designed to be easily audible, even at low CO concentrations.
With a two-year manufacturer's warranty, you can purchase these alarms with confidence knowing that they are built to last. Amazon’s standard returns policy applies should you experience any issues or have concerns regarding their performance within the warranty period – ensuring your peace of mind and providing flexibility if needed.
FAQ
What type of battery does each alarm use?
Each carbon monoxide alarm utilizes a readily replaceable 9V battery for reliable operation. This ensures continuous monitoring even during short power outages.
How do I test the alarms?
Both alarms have a clearly marked test button. Pressing this activates the audible and visual alerts, confirming they are functioning correctly. Regular testing is vital to ensure accurate detection.
What happens if one alarm fails?
Ideally, you should replace both alarms simultaneously to maintain continuous protection. However, if only one has failed, it’s still advisable to test the remaining one thoroughly.
Are these alarms suitable for flats?
Yes, these alarms are specifically designed and compliant with regulations for use in multi-occupancy dwellings like flats. Their low-decibel alarm ensures they won't disturb neighbours.
What if the alarms give a false alarm?
False alarms can occur due to various factors such as steam or cleaning products. Ensure good ventilation and check for any potential sources of contamination before retesting.
How sensitive are the CO sensors?
The sensors have been calibrated to detect CO levels at 0.1% (parts per thousand), which is below the recommended UK legal limit of 0.5%. This high sensitivity ensures early detection of even low concentrations.
Do I need a specific type of mounting kit?
The included mounting kit is suitable for standard wall and ceiling surfaces within the UK. Ensure you select a location away from direct sunlight, heat sources, and areas with high humidity.
What does the digital display show?
The digital display shows the current CO concentration in parts per million (ppm) as well as the alarm’s status – whether it's normal or detecting elevated levels of CO.
How often should I change the batteries?
While designed for battery-powered operation, we recommend checking the battery level monthly and replacing them when the low battery indicator illuminates. It's best practice to replace them every six months regardless.
Does this warranty cover damage caused by misuse?
The two-year manufacturer’s warranty covers defects in materials or workmanship under normal use. Damage caused by misuse, improper installation, or external factors is not covered under the terms of the warranty.