source of carbon monoxide...what is source

[noelex 77]

CO alarms that are set off by battery charging are a commonly reported false positive on boats.

However, CO is so dangerous that any alarm trigger should be treated as genuine until you are 100% sure no CO is present.

Some CO detecters have a display of the PPM and this will help track down low levels of the gas. The trigger point for the alarms is based on the PPM concentration and time. A very low level of CO will not trigger an alarm, a slightly higher level will trigger an alarm, but only after some time, and a moderate level will trigger an immediate alarm. A display of the actual PPM is helpful in understanding what is occurring and if another less dangerous gas is causing the alert.

CO detectors with PPM displays are not much more expensive than those without. I would purchase a new detector with this facility. It will help sort out the problem and also show if the existing detector has become faulty.

[GordMay]

Originally Posted by noelex 77

CO alarms that are set off by battery charging are a commonly reported false positive on boats.

However, CO is so dangerous that any alarm trigger should be treated as genuine until you are 100% sure no CO is present.

Some CO detecters have a display of the PPM and this will help track down low levels of the gas. The trigger point for the alarms is based on the PPM concentration and time. A very low level of CO will not trigger an alarm, a slightly higher level will trigger an alarm, but only after some time, and a moderate level will trigger an immediate alarm. A display of the actual PPM is helpful in understanding what is occurring and if another less dangerous gas is causing the alert.

CO detectors with PPM displays are not much more expensive than those without. I would purchase a new detector with this facility. It will help sort out the problem and also show if the existing detector has become faulty.

Indeed!