Process for producing standard gas mixture and apparatus for producing the same
US5157957A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 17, 1989 |
| Grant date | Oct 27, 1992 |
| Priority date | — |
| Expiry date | Nov 17, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/25625
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention provides a process for producing standard gas mixtures which entails purifying a raw gas using a gas purifier (3) such as a known two stage gas purifier system, thereby generating a high-purity diluent gas; PA0 mixing the high-purity diluent gas and at least one high-concentration standard gas, by generating a medium-concentration gas mixture; PA0 dividing the medium-concentration gas mixture into a first flow and a second flow; PA0 selectively mixing the first flow with a sample gas or a high-purity diluent gas or a mixture thereof, thereby obtaining a standard low-concentration gas mixture; and PA0 controlling the pressure of the sample gas, the second flow of the medium-concentration gas mixture and the standard low concentration gas mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.