Gas analysis diluter
US4004882A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 1975 |
| Grant date | Jan 25, 1977 |
| Priority date | — |
| Expiry date | Aug 14, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N1/34
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A mass exchange device and system that employs a semi-permeable diffusion barrier in the nature of a tubular membrane. A sample gas stream conduit is concentric with the tubular membrane, and the transport gas stream flows within the tubular membrane in a direction opposite to the flow of transport gas stream. Certain molecular species in the sample gas migrate across the tubular membrane and mix with the transport gas for passage to an analyzer. The conduit and tubular membranes are incorporated within a heat exchange cartridge and a heater and temperature controller maintain a desired temperature control of the system. Dual stream dilutions may be accomplished by sampling an exhaust gas prior to cleansing by a gas scrubber and also sampling the gas after cleansing. Both the upstream and downstream sample gases are diluted in a common heat exchange cartridge and passed to an analyzer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.