×

Device for gauging the level of a fluid

  • US 5,543,720 A
  • Filed: 03/02/1994
  • Issued: 08/06/1996
  • Est. Priority Date: 07/04/1991
  • Status: Expired due to Term
First Claim
Patent Images

1. A device for determining the level of a fluid contained in a container, that is, a flowing or granulate material, comprising a transmitter for transmitting a polarizable microwave signal through a first waveguide section, a receiver for receiving a reflected microwave signal, an electronic unit, arranged to determine the reflex position of the reflected microwave signal, and an antenna means with a second waveguide section, the first waveguide section being preferably circular in cross section,characterized in that, the transmitter and receiver are arranged respectively to transmit and receive microwave signals in different waveguide modes which are mutually orthogonal, that is, mutually independent, and further characterized by an interchangeable third waveguide section inserted between the first and second waveguide sections, provided with means for acting upon said microwave signal through polarization and/or damping, for optimal adaption of the device to different containers and antennae.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×