Unsafe carbon monoxide detectors

WHICH reveal unsafe carbon monoxide detectors

Which reveal  the unsafe carbon monoxide detectors that failed their safety test. Find out how to buy a safe one and avoid the models that put you risk.

A Which investigation has led to 10 dangerous carbon monoxide alarms being removed from sale by Amazon and Ebay.

Their independent tests revealed that a group of cheap and imported carbon monoxide alarms,widely available online, failed to detect the killer gas in more than a third of their tests.

All of the unreliable and dangerous alarms claimed to meet the EU safety standard (EN 50291) for carbon monoxide alarms. However,the results of their lab tests lead them to believe that these claims are false.

In contrast, 13 other carbon monoxide alarms from leading brands passed every one of the 312 gas detection tests. Which revealed the best carbon monoxide alarms based on their  independent tests in their carbon monoxide alarm reviews section.

Dangerous carbon monoxide alarms to avoid.

These three dangerous carbon monoxide alarms collectively failed 26 out of the 72 gas tests. They also come with potentially unsafe instructions advising owners to not install in the kitchen, where in most UK homes you’ll find the gas boiler.

  • ATZ Saviour Carbon Monoxide Alarm, £12.99 Failed to detect carbon monoxide in six gas tests.
  • Mudder Carbon Monoxide Alarm, £8.99 Failed to detect the killer gas in five gas tests.
  • Binwo Carbon Monoxide Alarm, £8.99   Failed to detect the killer gas in 15 gas tests.

Read more about these Don’t Buy carbon monoxide alarms plus, dangerous instructions and lookalike carbon monoxide alarm brands.

Following the three alarms failing the Which lab tests, they  purchased eight more identical alarms from Amazon, which sells dozens of lookalike brands that they were equally concerned about.

Seven included the same dangerous installation advice, which could lead to the alarm being fitted too far away from the source of carbon monoxide to be able to detect the gas.

Four claimed they were ‘Calibrated per EN 50291’, the EU safety standard, but Which believed these claims are false.

Which? are pleased that 10 dangerous carbon monoxide detectors have been withdrawn from sale following the investigation, but  with many alarms indistinguishable from those that failed tests are still for sale on Amazon, Ebay it is a case of buyer beware.

They advise that if you are buying a carbon monoxide alarm, look to pay around £20, look for the Kitemark on packaging and check out their carbon monoxide alarm reviews before you buy.


Award-winning blogger and former care columnist for Devon Life magazine. I am passionate about helping elderly people and people with dementia live purposeful and independent lives.
Designer of the Dementia Assistance Card and Points Of Light award recipient, Caron hopes to help carers when resources are limited and demand is ever-increasing. I am here to support you.

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