The Carbon Monoxide alarms currently available in the UK may be made to one of three standards. They do not all require the alarms to sound at the same levels.
- For the UK market there are two standards, BS7860:1996 and EN50291:2001. The BS7860:1996 has been made obsolete and since April 2006 all new Carbon Monoxide alarms should be manufactured using EN50291:2001.
- Alarms manufactured for the North American market use the American Standard - UL2034 .
The kite mark means the product has been independently tested and proves that it meets the standard. The CE mark usual means the alarm has been test for electrical safety and radio frequency interference. It does not mean it has been tested for performance in detecting Carbon Monoxide.
| EN50291:2001 |
50PPM - between 60-90mins |
100PPM - between 10-40mins |
300PPM - less than 3mins |
| UL2034 |
70PPM - between 60-240mins |
150PPM - between 10-50mins |
400PPM - between 4-15mins |
| BS 7860:1996 |
45PPM - No alarm before 60mins |
150PPM - must alarm within 10-30mins |
350PPM - must alarm within 6mins |
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