Measuring and testing – Fluid pressure gauge – With pressure and/or temperature compensation
Patent
1994-02-03
1996-06-25
Chilcot, Richard
Measuring and testing
Fluid pressure gauge
With pressure and/or temperature compensation
73720, 73726, 338 42, 374198, G01L 1904, H01C 1010
Patent
active
055289401
ABSTRACT:
A differential pressure transmitter having a differential pressure sensor, a temperature sensor and a static pressure sensor all provided on the semiconductor substrate of a single semiconductor chip. A reference resistor is provided in a part of the chip. Resistances of the differential pressure sensor and the reference resistor are compared periodically in order to determine the condition including service life of the differential pressure sensor.
REFERENCES:
patent: 4468968 (1984-09-01), Kee
patent: 4598381 (1986-07-01), Cucci
patent: 4872349 (1989-10-01), Espiritu-Santo
Tobita Tomoyuki
Yamamoto Yoshimi
Chilcot Richard
Felber Joseph L.
Hitachi , Ltd.
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