Capacitive pressure transmitter

Measuring and testing – Fluid pressure gauge – Diaphragm

Reexamination Certificate

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Details

C073S724000

Reexamination Certificate

active

07124641

ABSTRACT:
A capacitive pressure transmitter is provided. In one aspect, the transmitter includes a capacitive pressure sensor coupled directly to the measured media without any intervening fluid isolation. A filter is preferably used to keep particulates from reaching the measuring diaphragm. In another aspect, a capacitive pressure transmitter is provided with at least one self-contained isolator interposed between a process connection and the capacitive pressure sensor. In both aspects, the capacitive pressure transmitter is relatively small and preferably constructed from materials that facilitate low-cost manufacture.

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patent: 6089097 (2000-07-01), Frick et al.
patent: 6295875 (2001-10-01), Frick et al.
patent: 6484585 (2002-11-01), Sittler et al.

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