Measuring and testing – Specific gravity or density of liquid or solid
Patent
1998-01-30
2000-05-09
Williams, Hezron
Measuring and testing
Specific gravity or density of liquid or solid
73 3001, G01N 900
Patent
active
06058761&
ABSTRACT:
The relative density of a sample of a supply gas under test is determined by measuring an atmospheric pressure and a pressure differential for the reference gas and the sample gas as each is passed through a small orifice (16) with smooth walls, such as a pore formed in a sapphire jewel. The pressure measurements are made on a time base determined during the reference gas cycle. A microcontroller (15) then computes a relative density for the sample gas based on a known relative density for the reference gas and a ratio of pressure factors for the sample gas and the reference gas in a system operating at in a range from about 1 to about 6 psig.
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Badger Meter Inc.
Tran Thuy Vinh
Williams Hezron
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