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1. (WO2013110764) FILL LEVEL MEASURING DEVICE

Pub. No.:    WO/2013/110764    International Application No.:    PCT/EP2013/051446
Publication Date: Fri Aug 02 01:59:59 CEST 2013 International Filing Date: Sat Jan 26 00:59:59 CET 2013
IPC: G01F 23/26
H03K 17/95
Applicants: IFM ELECTRONIC GMBH
Inventors: HOCH, Werner
Title: FILL LEVEL MEASURING DEVICE
Abstract:
Fill level measuring device having a control unit 1, which contains a high-frequency generator 4 for generating a transmission signal S, an amplifier 5a, an amplifier 5b and an evaluation unit, and a spatially remote probe 2, which contains a measuring impedance 6, a reference impedance 7, a first rectifier 8a and a second rectifier 8b, as well as a connecting line 3 between the control unit 1 and the probe 2, wherein the rectifier 8a detects the voltage of the transmission signal S in the probe 2, and this voltage is transmitted to the control unit 1 as a first DC voltage signal, and the rectifier 8b converts the probe current in the probe 2 into a second DC voltage signal via measuring resistors 9a and 9b, and both signals are supplied to the control unit 1 for the purpose of determining the fill level, wherein the rectifiers 8a and 8b are thermally coupled to one another.