Differential pressure sensor

Details Differential pressure sensor Differential pressure sensor

1984-08-06

1987-03-03

Garrett, Robert E.

Expansible chamber devices

Bellows type expansible chamber

Plural bellows

92 48, 73716, G01L 1302

Patent

active

046466240

ABSTRACT:
Sensed pressures are applied to a differential pressure sensor such that one-half the sensed pressure drop is applied to each of a pair of redundant pistons. Failure of one of a pair of bellows which seal opposite faces of the pistons from one another effects application of the entire pressure drop across the piston associated with the remaining, operable bellows for fail-safe operation of the sensor.

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patent: 3771543 (1973-11-01), Wiggins
patent: 3874405 (1975-04-01), Thayer
patent: 4131130 (1978-12-01), Ruby
patent: 4449548 (1984-05-01), Tutherly

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