Answer
Nov 22, 2023 - 02:42 PM
If you have a CO sensor reading at 18ppm in a confined space, that is a permissible exposure level. That means anything less than 35ppm CO has no apparent toxic symptoms. Readings up to 50ppm over a time period of 8 hours will give a human physical symptoms. The higher the Carbon Monoxide levels the faster symptoms will take effect.
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