Sensor for detecting dielectric properties and their changes - has electrode, RC generator, PLL filter and evaluation unit

摘要

The sensor detects dielectric properties and their relative changes of liquid, gaseous and/or bulk materials. An electrode (11) is connected to an RC generator (20) which is connected to a filter (30). The filter is connected to an evaluation unit (40) with a display. The filter is a passive and/or active type and can be a Phase Locked Loop. USE/ADVANTAGE - E.g. for on-board measuring of quantity and/or quality of motor vehicle brake fluid. The sensor can detect the state of diverse types of media.