Measurement of relative density of combustible gases
US6058761A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 30, 1998 |
| Grant date | May 9, 2000 |
| Priority date | — |
| Expiry date | Jan 30, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N9/32
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.