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1. (WO2005104348) ELECTROMAGNETIC RESONANT SENSOR

Pub. No.:    WO/2005/104348    International Application No.:    PCT/US2005/008567
Publication Date: Nov 3, 2005 International Filing Date: Mar 15, 2005
IPC: G01N 21/00
Applicants: ROSEMOUNT, INC.
FRICK, Roger, L.
Inventors: FRICK, Roger, L.
Title: ELECTROMAGNETIC RESONANT SENSOR
Abstract:
An electromagnetic resonant sensor (800) has a dielectric sensor body (802) through which electromagnetic wave energy is propagated. The sensor body (802) has a cavity, with surfaces facing one another to define a gap (810) that varies as a function of a parameter to be measured. The resonant frequency of an electromagnetic standing wave (814) in the body (802) and the variable gap (810) changes as a function of the gap dimension.