The working principle of catalytic sensors involves a catalytic reaction between the target analyte and the catalyst material. When the analyte comes into contact with the catalyst, it undergoes a reaction that releases energy. For example, in a catalytic combustion sensor, the target gas combusts on the catalytic surface, leading to a temperature increase. This temperature change is then detected by a temperature-sensitive element, such as a thermistor, which converts the thermal change into an electrical signal.
