Measuring relative density of a gas
US6474137B1 · kind B1 · utility
3Cited by
13References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 3, 2000 |
| Grant date | Nov 5, 2002 |
| Priority date | — |
| Expiry date | Feb 3, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/102
- WIPO fieldMeasurement
- WIPO sectorInstruments
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 formulaRD=a×SoSsc+b,where SoSsc is the speed of sound in the gas corrected to standard conditions, and a and b are constants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.