Measuring and testing – With fluid pressure – Leakage
Patent
1991-09-11
1992-07-21
Williams, Hezron E.
Measuring and testing
With fluid pressure
Leakage
73328, G01M 326
Patent
active
051312646
ABSTRACT:
An apparatus for detecting a change in the amount of liquid in a storage tank. The apparatus comprises a vertical upright standpipe for filling with a liquid to a level that generates a hydrostatic head pressure substantially equivalent to that exerted by the liquid in the storage tank; a sensor for sensing hydrostatic head pressure differential between the liquid in the storage tank and the liquid in the standpipe; a connector for connecting the standpipe to the pressure differential sensor, the standpipe connector being substantially horizontally disposed to the standpipe; and a connector for connecting the storage tank to the pressure differential sensor, the storage tank connector being substantially horizontally disposed to the storage wherein the standpipe connector and the tank connector are in substantial axial alignment with each other. Any change in the liquid pressure in the tank as a result of leakage from the tank will change the differential pressure measured by the pressure transducer. The apparatus is particularly useful in the detection of leaks from storage tanks containing highly volatile liquids, such as gasoline.
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Lawford, V. N. Hydrostatic Liquid Level Measurment In Instr. & Control Syst. pp. 79-81. Aug. 1970.
McKillop Alexander J.
Mlotkowski Michael J.
Mobil Oil Corporation
Roskos Joseph W.
Speciale Charles J.
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