Patent ID: 7821444

Claim:
A radar level gauging system for determining a level of a surface of a product in a tank, comprising: a propagation device arranged to allow microwave signals to propagate towards said surface, and to return a reflection of said microwave signals from said surface; at least two radar level gauge (RLG) units, each RLG unit including: transceiver circuitry connected to said propagation device, said transceiver circuitry being adapted to transmit a microwave signal to said propagation device and to receive a reflected signal related to said reflection, processing circuitry connected to said transceiver circuitry and adapted to determine said level based on a relation between transmitted and received signals, and a communication interface for communicating measurement data acquired by said RLG unit externally of said RLG unit; and said system further comprising: a communication link interconnecting said RLG units, for communicating control data between the RLG units, said communication link comprising an isolating interface, ensuring galvanic isolation between said RLG units.