Measuring relative density of a gas
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United States of America Patent
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Nov 5, 2002
Grant Date -
N/A
app pub date -
Feb 3, 2000
filing date -
Jul 22, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus for measuring the relative density of a gas, for example natural gas. The gas is supplied through an inlet to a chamber and is output through an outlet. Using a control and an ultra-sonic transducer emitter and an ultra-sonic transducer receiver, the speed of sound in the gas corrected to standard conditions is calculated. Then, the control operates to measure the relative density RD of the gas using the formula RD=a.times.SoSsc+b, where SoSsc is the speed of sound in the gas corrected to standard conditions, and a and b are constants.
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