In this guide we’ll take a look at the best carbon monoxide detectors for the UK market.
We’ve compared battery life, LCD display, alarm volume and cost
to give you our top recommendations.

What is the Best Carbon Monoxide Detector?

IMAGERECOMMENDED PRODUCTSPRODUCTFEATURES
  • Battery life: 10 years
  • LCD display? Yes
  • Alarm volume: >90 dB
  • Battery life: 10 years
  • LCD display? No
  • Alarm volume: 85 dB
  • Battery life: 10 years
  • LCD display? Yes
  • Alarm volume: 85 dB
  • Battery life: 7 years
  • LCD display? Yes
  • Alarm volume: 85 dB
  • Battery life: 10 years
  • LCD display? No
  • Alarm volume: 85 dB

More Detailed Carbon Monoxide Detector Reviews

Honeywell XC100D Carbon Monoxide Alarm

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FEATURES
  • Battery life: 10 years
  • LCD display? Yes
  • Alarm volume: >90 dB
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Honeywell XC100D Carbon Monoxide Alarm Review

Honeywell is a leading American brand within industries as diverse as aerospace to sporting goods. They’re probably best known for their boilers and safety devices here in the UK though. We got our hands on their excellent XC100D carbon monoxide alarm, and put it through its paces.

It’s a comprehensive unit that’s easy to install and use, and tells you at a glance just how much CO there is in the room at any time. The battery is guaranteed to last ten years and will even let you know when it’s about to run out.

The feature we like the most about this alarm is the ability to link it up to other carbon monoxide and smoke detectors in your home. This means that even if you can’t hear the piercing alarm where you are, the big LCD will tell you what’s happening elsewhere.

FireAngel CO-9X-10T-FF Carbon Monoxide Alarm

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FEATURES
  • Battery life: 10 years
  • LCD display? No
  • Alarm volume: 85 dB
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FireAngel CO-9X-10T-FF Carbon Monoxide Alarm Review

FireAngel are the UK’s number one smoke and carbon monoxide detector brand, and the brand of choice for more than 90% of the UK’s fire and rescue services. They lead the way in research and development when it comes to home safety, so we made sure they were part of our list.

The CO-9X-10T-FF carbon monoxide alarm we tried out is a free-standing sealed battery detector with a ten-year guarantee. Even though it doesn’t have a display, it has an advanced electrochemical sensor that’s designed to accurately measure even the lowest levels of CO.

We really like the simplicity of the device. You can mount it to the wall, but also remove it easily to take with you. It’s the best carbon monoxide detector in terms of flexibility for having these two mounting options.

X-Sense Carbon Monoxide Alarm Detector with Digital Display

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FEATURES
  • Battery life: 10 years
  • LCD display? Yes
  • Alarm volume: 85 dB
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X-Sense Carbon Monoxide Alarm Detector with Digital Display Review

X-Sense produce a range of quality smoke alarms, carbon monoxide alarms and combination detectors that are sold in 48 different countries. They’re a relative newcomer to the industry, but have carved out a good name for themselves with specialist knowledge and world-class research systems.

We tested out their CO0D carbon monoxide alarm and really like the sleek, modern design as well as the excellent functionality and bright LCD display. It constantly monitors for traces of the deadly gas, but guarantees against false alarms to help you stay asleep all through the night.

We like the real-time CO level monitor, it takes the guesswork out of detecting CO, so you’ll know if there is anything to worry about where it’s placed. As a small, portable device, it’s well-suited for use in boats or caravans as well as in the kitchen or boiler room.

Mercury Battery Operated Carbon Monoxide Alarm

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FEATURES
  • Battery life: 7 years
  • LCD display? Yes
  • Alarm volume: 85 dB
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Mercury Battery Operated Carbon Monoxide Alarm Review

Mercury started life as a specialist aerial and communications company back in 1973, but have branched out into a diverse range of safety products from money checkers to metal detectors. We got our hands on their COD100B alarm and think it’s one of the best carbon monoxide detectors for the UK market.

Even though the battery life on this carbon monoxide alarm is the shortest on the list, it still lasts for an impressive seven years without having to worry about changing. The LCD is useful for displaying the CO parts per million, and the operation is still nice and simple. The single-button control allows you to reset.

Kidde Life Saver Carbon Monoxide Alarm

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FEATURES
  • Battery life: 10 years
  • LCD display? No
  • Alarm volume: 85 dB
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Kidde Life Saver Carbon Monoxide Alarm Review

Kidde Safety have been producing fire safety products in the UK since 1917. With more than a hundred years of experience making alarms, extinguishers, fire blankets and even escape ladders, they know a thing or two about home safety.

Their Model 5CO alarm is the simplest and easiest to use carbon monoxide alarm on this list. It’s as simple as pulling out the battery tab and placing it where it needs to be. It’s the best carbon monoxide detector for portable use, such as camping or in a campervan, because it’s so light and easy to store, but it still detects as well as any of the bigger units on the list.

Carbon Monoxide Detector Buyer’s Guide

Carbon monoxide poisoning is a silent killer. Anywhere that fuel is burned indoors, there is the chance that this odourless, colourless gas might leak out, with potentially devastating effects. You can guard against this with a carbon monoxide detector that constantly measures the levels of CO in the air, letting off an alarm should the air become dangerous.

FAQ

Where should I place my carbon monoxide alarm?

Buying the best carbon monoxide detector is pointless if you don’t put serious though into its placement.

Don’t place your carbon monoxide detector next to a window or door, on the floor or behind curtains or drapes. They can be affected by heat sources and open flames, and never try to use them outdoors.

When it comes to proper placement, you should always follow the instructions included with your new alarm. The best carbon monoxide detector will give detailed instructions on placement, but there are a few things to help out if they’re not clear enough.

Most detectors are best placed on the wall at head height in each room that contains a fuel burning device, as well as in hallways and corridors. This means it can pick up CO gas as it drifts through your home.

Conclusion

When it comes to safety, you can’t go far wrong with any of the alarms on our list. They’re the best carbon monoxide detectors available right now, but we need to come up with a winner overall. The Honeywell XC100D is the clear choice, simply because you can link up multiple devices to create a safety network of detectors in your home.

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