Patent ID: 9000775
Filing Date: 2015-04-07
Classification: G01F,G01N,G01R,G01S,H01Q

Abstract:
1. A fill-level measuring device for ascertaining and monitoring fill level of a medium located in the process space of a container by means of a microwave travel time measuring method, such device comprising: a measurement transmitter; an antenna unit, which is constructed at least of a hollow conductor and a horn shaped radiating element; and a microwave transmissive, process isolating element inserted for process isolation into said hollow conductor between said measurement transmitter and said horn shaped radiating element contacting the process space, wherein: said process isolating element is embodied as a hollow body having at least one tubular hollow body region matched to the shape of said hollow conductor, and a pointed hollow body region neighboring said tubular hollow body region in the direction of said radiating element and having a wall thickness selected based on reflection, or lack thereof, of the microwave signals, and there is present in said tubular hollow body region of said process isolating element up to said pointed hollow body region a metal tube electrically connected with said hollow conductor or, electrically connected with said hollow conductor, a metal coating of the inner wall of said tubular hollow body region of said process isolating element.