Pressure sensing system

Details Pressure sensing system Pressure sensing system

1981-07-29

1984-06-19

Yasich, Daniel M.

Measuring and testing

Liquid level or depth gauge

Hydrostatic pressure type

73299, 73751, 137100, 137403, F16K 3700, G01F 2316

Patent

active

044547609

ABSTRACT:
An apparatus for measuring fluid pressures which comprises a gas-type pressure sensor and a sensor control for supplying controlled purge gas to the sensor and for receiving vent gas from the sensor. The apparatus further includes a unique pressure-reducing device operable in response to a differential gas pressure in the sensor control for creating a zone of pressure less than any other in the apparatus, which zone is placed in fluid communication with gas in the apparatus to reduce the overall pressure thereof. This permits the accurate measuring of pressure at or below atmospheric. An integral design and a retrofit design are disclosed.

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