Possibilities of planar capacitive rain sensor manufacturing by thick film technology

Anotace: In this paper, characterization and realisation of planar thick film rain sensor based on capacitive principle is presented. By using three different pastes (inks) for realisation of capacitive sensor it was found out that sensor produced by carbon ink is not suitable for use in this application because it shows no change in measured capacitance when temperature or humidity level varies. The best characteristics were obtained by using silver conductive paste. Capacity of capacitive sensor realized by polymer silver paste shows rising tendency when temperature and humidity values rises.