WATER CONTENT SENSOR

摘要

PROBLEM TO BE SOLVED: To provide a water content sensor capable of generating an analog signal according to water content. SOLUTION: This water content sensor comprises an electrode part 1 having a pair of electrodes 1a and 1b, a detection circuit part 2 for detecting a change in impedance between the two electrodes 1a and 1b varying according to the water content between the two electrodes 1a and 1b, and an output circuit part 3 for generating a voltage signal having an amplitude corresponding to the result of detection of the detection circuit part 2.