Indicator for high carbon monoxide concns in air - with self-adhesive or magnetically mounted base plate

摘要

A device for indicating the presence of carbon monoxide in high concns. in the atmosphere consists of a Pd cpd. mounted on a base next to a colour scale for comparison. The palladium cpd. changes colour as the CO concn. reaches a predetermined level. It is intended for the protection of vehicle mechanics, traffic policemen, drivers of heavy vehicles, etc.