Patent ID: 8482296
Filing Date: 2013-07-09
Classification: G01F,H01Q

Abstract:
1. An apparatus for ascertaining and monitoring fill level of a medium in a container by means of a travel-time measuring method utilizing high-frequency measuring signals, comprising an antenna having an antenna coupling region and an antenna region, or a waveguide having a probe coupling region and a probe measuring region extending into the container, wherein: said antenna coupling region, said antenna region, said probe coupling region and/or said probe measuring region have hollow spaces which are at least partially filled with a dielectric filling body; and said dielectric filling body has internally at least one, hermetically sealed closed, cavity volume, wherein the dielectric filling body is completely hollowed out by a closed cavity volume, so that only a thin wall still remains, and the hermetically sealed, closed cavity volume is so embodied, that the dielectric filling body has a predetermined wave resistance and/or the high-frequency measuring signals have a predetermined propagation characteristic.