what will carbon monoxide detector sound like if there is CO in home?

carbon monoxide detectors how many image

Chloegirl

I just plugged in a first alert carbon monoxide detector down in basement. The horn will sound once or twice every 20 minutes or so and the red light will flash every so often also. Is this a malfunction or is there CO in my home?

Answer
A very load chirping noise.

Is it normal for a carbon monoxide detector to read 0 ppm?

dfjkdfj

Sorry for posting a second time, but the first question did not get any good answers. Is it normal for a carbon monoxide detector to read 0 PPM? I have one that shows the highest level over the past 24 hours, and whenever I check it always reads 0 PPM. Is this normal? I would think there might be one or two PPM in the house, considering the lowest level it would bother sensitive people is 30 PPM.

Answer
Actually in the 0 to 29 ppm level CO detectors are not allowed to display the actual CO level, and are required to display zero in that range according to CO alarm standards developed by Underwriters Laboratories (UL2034) in collaboration with the US Consumer Product Safety Commission. (The display and alarm specifications of UL2034 are matched in a Canadian standard, CSA 6.19-01)

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