DEVICE FOR DETERMINING THE LEVEL OF A FILLER MATERIAL IN A CONTAINER

摘要

The invention relates to a device for determining the level of a filler material in a container. Said device comprises a signal generation unit, which creates electromagnetic measurement signals and a transceiver unit (2), which transmits the measurement signals towards the surface of the filler material via an antenna (1) and receives the echo signals reflected by said surface. The antenna (1) consists of a waveguide (3), which is enlarged in the emission direction to form a cavity (4) of a defined shape. The invention also comprises an evaluation unit, which determines the level of the filler material in the container, using the propagation time of the measurement signals. The aim of the invention is to provide a stable device for measuring the level of a filler material, in which the formation of any deposition is practically impossible. To achieve this, at least one dielectric filler material (5) that at least partially fills the waveguide (3) and that almost completely fills the enlarged cavity (4) of the antenna (1) is provided.