Dynamic dilution system
US5661225A · kind A · utility
16Cited by
6References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 12, 1996 |
| Grant date | Aug 26, 1997 |
| Priority date | — |
| Expiry date | Sep 12, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/0352
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for generating a low concentration calibration gas mixture containing percent, ppm, ppb or ppt amounts of a desired analyte from a high concentration gas mixture and a high purity diluent using a series of source gas containing vessels and a series of parallel gas or chemical conduits controlled by mass flow controllers in a purged enclosure with conduits to purge gas conduits of residual gases or corrosive gases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.