Measurement of fluid density

Details Measurement of fluid density Measurement of fluid density

1978-11-22

1981-04-21

Swisher, S. Clement

Measuring and testing

Gas analysis

Density or specific gravity

73 32A, 7386111, G01N 900

Patent

active

042625238

ABSTRACT:
A vibrating fluid density transducer 10 provides a gas density measurement D, used in conjunction with a flowmeter signal f.sub.B to meter the mass of gas fed through a pipeline. D is subject to errors dependent upon the velocity of sound C in the gas. The errors are corrected to yield Da by application of a correcting formula (block 18) in which C is introduced by calculation (block 17) from a measurement of gas pressure P by a transducer P. The value of C may alternatively be measured directly, computed from a measurement of specific gravity or in the case of a liquid, be inferred from D or be preset.

REFERENCES:
patent: 3874221 (1975-04-01), Deverill
Potter, P.N., Sound Velocity Effect on Vibrating Cylinder Density Transducers, a Publication of the Solartron Electronic Group Ltd. Farnborough, Hampshire, England, no date given but cited in U.S. Pat. No. 3,874,221.

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