1. Carbon monoxide gas sensor
It can either be battery-operated or AC powered.
Mostly the sensor will not sound an alarm at lower concentrations (e.g. 100 ppm). The alarm will sound within a few minutes at 400 ppm. So the function is specific to concentration-time. Figure shows simple carbon monoxide sensor.
1. Carbon monoxide gas sensor (Contd.)
Carbon monoxide sensor can be of different types such as:
Semiconductor sensor
Electrochemical sensor
Digital sensor
Biomimetic sensor (chem-optical or gel cell sensor)