The working principle of catalysis based sensors involves a catalyst that interacts with the target analyte. The interaction often leads to the conversion of the analyte into a different chemical species. This chemical transformation can cause a detectable change in properties such as temperature, electrical resistance, or light emission. For instance, in a catalytic gas sensor, the oxidation or reduction of a gas on the catalyst surface can lead to a change in the resistance of a semiconductor material, which can then be measured.
