Method and apparatus for determining the density of a gas

Details Method and apparatus for determining the density of a gas Method and apparatus for determining the density of a gas

1988-12-19

1990-06-19

Chapman, John

Measuring and testing

Specific gravity or density of liquid or solid

G01N 926, G01N 932

Patent

active

049341782

ABSTRACT:
The method and apparatus for determining the density of a gas by measuring the time for a predetermined its flow through a sub-sonic square-root restrictor, such as a venturi, the rate of increase or decrease of the pressure in a reference chamber, a semi-continuous measurement means utilizing a motor driven, constant rate-of-movement piston being disclosed as well as a continuous density measurement means including a sub-sonic square-root restrictor followed, in fluid flowing fashion by a sonic restrictor venting to the atmosphere.

REFERENCES:
patent: 4285245 (1981-08-01), Kennedy
patent: 4527418 (1985-07-01), Arcara
patent: 4528847 (1985-07-01), Halmi
patent: 4651572 (1987-03-01), Albertz et al.

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