Gas alarms are often said to be prone to false alarms.
Gas sensors also respond to cylinder gas- or narcotic gas-like substances in certain concentrations. Therefore, technically speaking, there are no false alarms; it is just that possible causes are not linked to the device:
deodorants, aftershave, harsh cleaning agents, bodily gases (especially from our four-legged friends) or even alcohol on the breath or fondues can by all means cause a sensitive gas alarm to go off.
Despite the temperature compensation, the continuous self-tests and the intelligent software evaluation of the sensor measurements, sometimes a false alarm cannot be ruled out.
The reliability in an emergency comes first:
It’s better to have an alarm go off one too many times than one too few.
Just the right mounting height simply filters out only ‘bad’ gases (i.e. false alarms) decisively.