A moisture sensor for detecting moisture on the surface of a transparent material. The moisture sensor includes one or more emitters for producing emitter signals which are influenced by moisture on the transparent material, and one or more detectors for receiving the emitter signals. The detector produces...http://www.google.es/patents/US6091065?utm_source=gb-gplus-sharePatente US6091065 - Moisture sensor with digital signal processing filtering
Moisture sensor with digital signal processing filtering
