Measuring and testing – Liquid level or depth gauge
Reexamination Certificate
2007-05-31
2011-12-06
Williams, Hezron E (Department: 2856)
Measuring and testing
Liquid level or depth gauge
Reexamination Certificate
active
08069721
ABSTRACT:
A radar level gauge system, for determining a filling level of a product contained in a tank, the radar level gauge system comprising a transceiver including a signal generator for generating electromagnetic signals for transmission; a transmitter branch for transmitting the electromagnetic signals; and a receiver branch for receiving electromagnetic signals, the transmitter branch and the receiver branch each being connected to a transceiver input/output terminal. The radar level gauge system further comprises a propagation device for allowing transmitted electromagnetic signals to propagate towards a surface of the product inside the tank, where signals are reflected, and for returning reflected electromagnetic signals back from the surface of the product; processing circuitry connected to the transceiver and configured to determine the filling level based on the reflected electromagnetic signals; and power level adjusting circuitry connected between the transceiver input/output terminal and the propagation device, and configured to adjust a power level of the transmitted electromagnetic signals by a transmission gain factor, and to adjust a power level of the returned reflected electromagnetic signals by a reception gain factor, the transmission gain factor being smaller than the reception gain factor, wherein the power level adjusting circuitry comprises at least one active component.
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Communication for EPO Application No. 08156277.9-1234/1992922 dated Jul. 3, 2009; 4 pages.
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Devito Alex
Rosemount Tank Radar AB
Westman Champlin & Kelly P.A.
Williams Hezron E
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