Multilayer inkjet printed dew point hygrometer

This paper describes the dew point temperature hygrometer as a complex microsystem manufactured using inkjet printing directly on the surface of a Peltier couple heat pump. The principle of the structure's fabrication is similar to that of other sensors printed directly on textiles, paper or thin foils, but is much more difficult to perform. Both the principle of specific detector construction as well as some technological aspects are discussed in the paper. All three elements of the detector i.e. thermoresistor, heater and impedance dew detector are widely characterized to ascertain the performance of each. Final tests of the whole dew point hygrometer operation parameters are carefully reported and discussed in the conclusions.