Measuring and testing – Specific gravity or density of liquid or solid – Hydrostatic pressure type
Patent
1980-02-29
1981-12-29
Gill, James J.
Measuring and testing
Specific gravity or density of liquid or solid
Hydrostatic pressure type
73439, G01N 926
Patent
active
043076092
ABSTRACT:
An apparatus for measuring the density of a liquid or of a suspension of solids in a liquid is disclosed. The apparatus comprises two pressure sensors adapted to be mounted in the liquid so that the two sensors are vertically at predetermined levels apart, a differential pressure transducer, and proper tubings including a differential pressure zeroing device interconnecting the pressure sensors to the differential pressure transducer, for providing an output proportional to the density of the liquid which is compensated for the differential pressure caused by the differential neight of said pressure sensors in the liquid. In a preferred embodiment of the invention, the differential pressure zeroing device is a pair of U-tubes filled with liquid and the tubings comprise gas filled tubings interconnecting one branch of each U-tube to respective pressure sensors and the other branch of each U-tube to the differential pressure transducer.
REFERENCES:
patent: 3397581 (1968-08-01), Bush
patent: 4116076 (1978-09-01), Nolte
patent: 4136567 (1979-01-01), Rosenblum
Gill James J.
Noranda Mines Limited
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