Patent ID: 8350751
Filing Date: 2013-01-08
Classification: G01F,H01Q

Abstract:
1. A radar level gauge for determining the filling level of a product in a tank, said radar level gauge comprising: a transceiver for transmitting and receiving microwaves in an operation frequency band, processing circuitry connected to the transceiver and adapted to determine the filling level based on a relation between microwaves transmitted and received by the transceiver, an antenna connected to said transceiver and arranged to emit and receive microwaves through an opening of the tank, a microwave transmissive sealing member adapted to cover said opening and to provide pressure sealing of the tank, said sealing member comprising a metal grid layer providing structural strength, said metal grid layer having sealed openings formed to allow transmission of microwaves, wherein said openings are formed to have a resonance frequency in said operation frequency band.