Pneumatic level sensing

Details Pneumatic level sensing Pneumatic level sensing

1974-05-29

1976-10-26

Goldstein, Herbert

Measuring and testing

Liquid level or depth gauge

Hydrostatic pressure type

G01F 2314

Patent

active

039876756

ABSTRACT:
A pneumatic liquid level sensing apparatus for marine tankers has a dip tube which by having air or gas applied to it bubbles into the liquid in a tank and produces a back pressure corresponding to the depth of the tube in the liquid, a pressure responsive valve device responsive to the back pressure relays a signal to a remote indicator and the provision of a balance pipe above the surface of the tanker liquid connected to a balancing input of the valve device enables the output of the valve device to be independent of the value of the air or gas pressure in the tank.

REFERENCES:
patent: 2331208 (1943-10-01), Ludi
patent: 2427690 (1947-09-01), Peterson
patent: 2736199 (1956-02-01), Ibbott
patent: 3052126 (1962-09-01), Laas
patent: 3169402 (1965-02-01), Baker
patent: 3380463 (1968-04-01), Trethewey
patent: 3681546 (1972-08-01), Coin et al.
patent: 3729997 (1973-05-01), Luke

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