Measuring and testing – Gas analysis – Detector detail
Patent
1993-12-20
1995-05-02
Williams, Hezron E.
Measuring and testing
Gas analysis
Detector detail
73 2501, 374143, G01M 326, G01N 2712
Patent
active
054109086
ABSTRACT:
A sensing circuit includes a passive electrical network which has a first electrical property responsive to fluid pressure, and a second electrical property responsive to fluid temperature. A network output is responsive to the first property to a first extent, and to the second property to a second extent. The first and second extents are related in the same manner as a physical property of the fluid (other than its pressure or temperature) relates to its pressure and temperature. The network can include a strain gage that has a gage factor relating the pressure in the fluid to the first electrical property, and a temperature coefficient of gage factor responsive to the fluid temperature. The network can operate according to a gas law and indicate the amount of gas in a tank.
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Data Instruments, Inc.
Wiggins J. David
Williams Hezron E.
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