10 Best Gas Detectors 2025 in the UK

The FireAngel Carbon Monoxide Alarm and Detector (FA6813) is designed primarily for home use, detecting carbon monoxide (CO) with an advanced electrochemical sensor. This ensures accurate detection of dangerous CO levels. The alarm system is loud, producing 85 dB(A) chirps and a flashing red LED light, making it easily noticeable during a CO event. Additionally, it includes a test button for regular checks and uses replaceable AA batteries, with alerts for low battery levels. The 'Sleep Easy' function allows temporary silencing of these alerts for 8 hours, which can be useful during nighttime disturbances.

This detector is highly portable, compact, and includes a mounting bracket for easy installation, making it suitable for travel and holiday use. The product conforms to relevant safety standards (BS EN 50291-1: 2008 and EN 50291-2: 2019), ensuring reliability and assurance in its performance. However, it is not compliant with new regulations for Scottish homes.

Its durability and environmental suitability are supported by positive customer reviews and its high ranking in DIY & Tools. While the inclusion of batteries is a plus, users must remember to replace them promptly. This CO detector is ideal for anyone looking for a portable yet reliable device to ensure safety from carbon monoxide exposure at home or while traveling.

The FireAngel Carbon Monoxide Detector FA3820 is designed for home and travel use. It features an advanced electrochemical sensor that accurately detects dangerous levels of carbon monoxide and alerts users with a loud 85 dB alarm and flashing red LED light. One of its strong points is the 10-year sealed battery, which ensures long-term operation without the need for battery replacements. The device also has a high sensitivity mode, activating quicker alerts if CO levels are predicted to rise, which is a great safety feature.

Additionally, its alarm memory is useful as it continues to signal prior exposure to CO even if you're not home when it happens. Its small and portable design makes it easy to take along on holidays or for use in rental properties. Plus, it comes with an integrated mounting bracket for simple installation. The alarm is certified and meets high safety standards, adding to its reliability.

However, one possible drawback is that it’s specifically designed for carbon monoxide detection, so it might not be useful for other gas detections. Additionally, while the loud alarm and flashing lights are effective for alerting, they could be overly startling in quiet environments. The product is well-reviewed with a 4.6 out of 5-star rating and is highly ranked in its category. This detector would be ideal for households looking for a reliable, easy-to-install CO detection solution and travelers needing portable safety equipment.

The Google Nest Protect is a smoke and carbon monoxide detector that stands out with its dual-functionality and smart features. It uses a split-spectrum smoke sensor capable of detecting both fast and slow-burning fires, which enhances its reliability in various fire scenarios. One of its major strengths is the ability to send alerts directly to your smartphone, a feature that ensures you are informed about potential dangers whether you are home or away. Additionally, it speaks to you and pinpoints the location of the issue, adding a layer of clarity and reassurance during emergencies.

This detector runs on batteries, making it versatile for placement without the need for hardwiring, although battery dependency means you must stay vigilant about replacements. It does have a self-checking mechanism that runs over 400 times a day, ensuring the system is operationally sound, and it even notifies you when batteries are low. The Nest Protect includes thoughtful features like the Steam Check to prevent false alarms from shower steam and Pathlight to illuminate dark hallways at night.

It is designed for easy installation and setup via an app on iOS or Android, which facilitates swift integration into your home system. However, its reliance on a smartphone app might be cumbersome for those not accustomed to using apps regularly. While it excels in technological advances and comfort, some might find its higher price point a drawback, especially given that it ranks as a top seller in the combination smoke and carbon monoxide detector category. It's ideal for those who value smart home integration and want a comprehensive alert system both at home and on the go.