Patent ID: 7864104
Filing Date: 2011-01-04
Classification: G01F,H01Q

Abstract:
1. An apparatus for ascertaining and monitoring the fill level of a medium in a container by means of a travel-time measuring method of high-frequency measuring signals, comprising: a horn antenna having a waveguide section, a flared, horn section, and a cavity filled, at least partially, with a dielectric filling body, wherein a defined separation is provided in said flared, horn section between the inner surface of said horn antenna and the outer surface of said dielectric filling body for compensating different thermal expansions of said dielectric filling body and said horn antenna, and at least one sealing element or oat least one locking element between said filling body and said horn antenna is provided for performing a sealing function and, simultaneously, a locking of said filling body in said horn antenna, wherein: an outer surface of said filing body lies directly against the inner surface of said horn antenna over a certain length for pressure-resistance purposes, with an encircling ridge being formed for stabilizing the position of said filling body relative to the central axis; and said sealing element or said locking element is placed in said waveguide section between said horn antenna and said filling body.