An elongated sensor electrode assembly (4) has sensor and auxiliary electrodes (5,6) arranged at a predetermined minimum distance. Electrode assembly is connected to a control circuit. Sensor electrode is connected respectively to low electric potential node and capacitor at specific time periods. Auxiliary electrode is connected to a high electric potential node. An insulator cover (10) is arranged on a cover (2) for hermetically sealing the electrode assembly. Distances (12,13) of sensor electrode from outer surface (11) and front surface of cover are about 10 mm.
Kapazitiver Annäherungssensor
Capacitive proximity sensor
Capteur de rapprochement capacitif
20.06.2018
Patent
Elektronische Ressource
Deutsch