Patent ID: 6847214

Claim:
A device for determining and/or monitoring the level of contents, or the location of the boundary face between two media or phases, in a container, in which on the container at least one structural part is provided, on which or in whose surroundings at least a sensor-associated part of the device is mounted, having; a signal generating unit, which generates high-frequency measurement signals, said signal generating unit having an input unit and a conductive element, the measurement signals being input to said conductive element via said input unit; and a receiving/evaluating unit, which directly or indirectly via the transit time of the measurement signals, reflected from the surface or boundary face of the contents, determines the level of the contents or the location of the boundary face in the container, wherein: said input unit has at least a length that corresponds essentially to the spacing from the container wall to the lower edge of the structural part and is positioned such that the transition region input unit—conductive element is located approximately in the plane of the lower edge of the structural part; and the diameter of the opening of said input unit at the transition region input unit—conductive element is on the order of magnitude of the wavelength of the high-frequency measurement signals.