FIELD: physics, measurements.
SUBSTANCE: invention is related to device for capacitance detection and/or control of medium (1) filling level in reservoir (2). Device comprises at least one probing device (5), which is electrically insulated relative to medium (1) and at least one electronic unit (7), which supplies at least one electric control signal (AS) to probing device (5), and which receives electrical measured signal from probing device (5) and evaluates measured signal from the filling level point of view. Besides control signal (AS) is AC voltage electric signal. Invention also covers the fact that electronic unit (7) is arranged so that at measurement phase it supplies control signal (AS) to probing device (5). Besides at the testing phase it supplies test signal (TS) to probing device (5). Moreover, at testing phase unit 7 receives measured test signal from probing device (5), besides test signal (TS) is formed so that it has at least one section with mainly permanent voltage value.
EFFECT: provision of possibility to detect medium leakage through insulation of probing device.
6 cl, 3 dwg
