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1. (WO2015117808) DEVICE FOR DETERMINING OR MONITORING THE FILLING LEVEL OF A FILLING MATERIAL STORED IN A CONTAINER

Pub. No.:    WO/2015/117808    International Application No.:    PCT/EP2015/050780
Publication Date: Fri Aug 14 01:59:59 CEST 2015 International Filing Date: Sat Jan 17 00:59:59 CET 2015
IPC: G01S 13/00
G01F 23/284
Applicants: ENDRESS+HAUSER GMBH+CO. KG
Inventors: FEISST, Klaus
BERGMANN, Eric
Title: DEVICE FOR DETERMINING OR MONITORING THE FILLING LEVEL OF A FILLING MATERIAL STORED IN A CONTAINER
Abstract:
The invention relates to a device for determining or monitoring the filling level of a filling material (7) stored in a container (8) in a process comprising a signal generating unit (1) which generates high-frequency measurement signals, a coupling/decoupling unit (2) which couples the high-frequency measurement signals into an antenna unit (3) or decouples said high-frequency measurement signals from the antenna unit (3), wherein the antenna unit (3) has a wave guide (4) and an antenna element (5) which widens in the direction of the filling material, wherein the antenna unit (3) emits the high-frequency measurement signals in the direction of the surface (6) of the filling material (7) and receives the echo signals reflected by the surface (6) of the filling material (7), and a control/evaluation unit (9) which determines the filling level of the filling material (7) in the container (8) from the transit time of the measurement signals. At least one process separation (10) is thereby provided in or on the antenna unit (3), which process separation protects the coupling/decoupling unit (2) from influences of the process, wherein a first process separation (10) is produced at least partially from a dielectric material with a specified porosity, and wherein the first process separation (10) is configured to be at least approximately transparent to the high-frequency measurement signals.