Method and apparatus for exact measurement of pressures by means

Details Method and apparatus for exact measurement of pressures by means Method and apparatus for exact measurement of pressures by means

1975-07-07

1977-02-08

Queisser, Richard C.

Measuring and testing

Liquid level or depth gauge

Hydrostatic pressure type

G01F 2316

Patent

active

040066363

ABSTRACT:
The invention relates to a method and apparatus for exact measurement of pressures by means of level or pressure measuring equipment of the bubble tube type. The equipment comprises a bubble tube, a source of pressure, a pressure transducer, and valves which are controlled by a sequence switch means. The invention is characterized in that immediately prior to taking a measurement the source of pressure is connected to the bubble tube for expelling possible liquid therein and in that the source of pressure is then disconnected from the bubble tube. The pressure transducer is connected to the bubble tube during a measuring interval of short duration.

REFERENCES:
patent: 3023619 (1962-03-01), Sandford
patent: 3286144 (1966-11-01), Hill
patent: 3729997 (1973-05-01), Luke
patent: 3739315 (1973-06-01), Kurtz et al.
patent: 3834236 (1974-09-01), Durin
patent: 3863079 (1975-01-01), Calabrese

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