Gas gage with zero net gas flow

Details Gas gage with zero net gas flow Gas gage with zero net gas flow

1990-05-07

1991-06-11

Williams, Hezron E.

Measuring and testing

With fluid pressure

Dimension, shape, or size

33DIG2, G01B 1308

Patent

active

050222589

ABSTRACT:
An instrument for measuring a gap between it and an opposing surface, comprising a gas conduit having an inlet and an outlet, a sensing orifice in the outlet, a gas pump connected to the inlet for applying an alternating pressure to the gas conduit so that puffs of gas are directed from and drawn back to the sensing orifice. A sensor is in fluid communication with the conduit responsive to a physical property of the gas responsive to a condition determined by the gap size and a circuit is responsive to the sensor to provide a signal respective to the physical property.

REFERENCES:
patent: 4142401 (1979-03-01), Wilson
patent: 4953388 (1990-09-01), Barada

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