Gas analyzer
US4256964A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 1978 |
| Grant date | Mar 17, 1981 |
| Priority date | — |
| Expiry date | Dec 22, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/37
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A gas analyzer includes a first conduit for the supply of gas to be tested, a second conduit for the supply of a standard gas, first and second cells, a light source for directing light rays through the first and second cells, and a detector for receiving the light rays after passing through the cells. There is provided a gas flow change-over device connected to the first and second conduits for alternating at fixed intervals between a first gas supply arrangement wherein fixed amounts of gas to be tested and the standard gas are simultaneously supplied to the first and second cells, respectively, and a second gas supply arrangement wherein the fixed amounts of the gas to be tested and the standard gas are simultaneously supplied to the second and first cells, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.