The one downside with this model is that it runs off a pair of AA batteries, which need to be switched out roughly every three years, making three changes during its lifespan. This isn’t a huge issue, but it means this model isn’t suitable for use in Scottish homes. It is, however, suitable for use in a boat or caravan, making it a good option if you need an alarm on your next boating or caravanning trip.

The Kidde Lifesaver 5CO continuously monitors for the presence of deadly Carbon Monoxide (CO) in the home, providing a constant protection against the effects of this deadly gas. The 5CO features two LED’s – The red LED illuminates when the alarm has detected CO in the atmosphere and the green LED confirms that DC power is present. The alarm can either be installed on a wall or just placed on a tabletop or shelf for added convenience. It is also ideal for use when on holiday and in rented accomodation. The Lifesaver 5CO features a 7 year sensor life with an end of life warning to replace the unit after seven years protection. The Kidde 5CO is a lightweight AA alkaline battery-operated Carbon Monoxide Detector with a 7-year warranty. Carbon monoxide sensors have a finite lifespan of between five and seven years, although a few manufacturers now claim that their sensors will last a full ten years. Generally speaking, it’s worth playing it safe and replacing your alarm a year or two before its life is supposed to run out. Tests in the US have shown that alarms over eight years old can fail to detect CO at levels of above 400ppm.The health effects of CO depend on the concentration and length of exposure (carbon monoxide concentration is measured in parts per million). According to respected CO alarm manufacturer Kidde, “a carbon monoxide detector is a time-weighted alarm that measures the buildup of carbon monoxide in a house. Most manufacturers suggest locating your alarm next to or near a gas appliance, and it’s worth having one in the same room as any fire or wood-burning stove. It should be around 1.5m from the ground and at least 30cm away from any ceiling, and most can be mounted on a worktop, shelf or table – or simply mounted on the wall. The 7DCO comes with a ten-year lifespan and is BS EN 50291-2 certified for camping, caravanning and travel, or even use on a boat. As with all CO detectors, the Kidde provides end-of-life and battery warnings, along with the obligatory test/reset button for peace of mind. The only thing to watch out for is that it’s powered by a pair of AA batteries which need replacing roughly every two years We had no issues whatsoever during tests, but it means this alarm won’t be compliant with the new Scottish regulations. The best carbon monoxide alarms you can buy in 2023 1. Nest Protect: Best smart CO and smoke detector

For a person to begin feeling the effects of carbon monoxide poisoning, they would need to be exposed to a carbon monoxide level of 50 parts per million (ppm) for eight hours. An alarm’s response time will vary depending on the level of carbon monoxide in the air. For example, an alarm will sound after three and a half hours of continuous exposure at a level of 50ppm, yet will sound after eight minutes of continuous exposure at a level of 400ppm.” Don’t think that CO alarms are just for your home, either. They’re essential for caravans and motorhomes, and you might even want to take one on holiday if you’re staying in a cottage or self-catering accommodation. Are there any features worth looking out for?

Key Product Features

Carbon monoxide is known as the silent killer because you can’t smell it, taste it or see it. Once it enters your bloodstream, it invades the red blood cells (haemoglobin), preventing them from carrying oxygen around the body. Symptoms of carbon monoxide poisoning include a flu-like headache, dizziness and nausea followed by tiredness, confusion, breathlessness, weakness, loss of muscular coordination and – dare I mention it – death. CO is so odourless that even dogs can’t detect it. How do CO alarms work? Most people will not experience any symptoms from prolonged exposure to CO levels of under, say, 40ppm. It depends on the length of exposure, but the real danger level starts at around 400ppm (two to three hours of exposure at this level can be life-threatening). To give you some idea of how dangerous higher levels of concentration can be, 1,500ppm could result in death within an hour and 6,000ppm within 15 minutes.