Optical gas analyzer
US4153837A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 16, 1978 |
| Grant date | May 8, 1979 |
| Priority date | — |
| Expiry date | Feb 16, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/3504
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical gas-concentration analyzer which utilizes the infrared absorption principle has a sample chamber and reference chamber with infrared source and detector assemblies spaced at opposite ends of an in alignment with the chambers. An electronic processing system utilizes a spectral-absorption electrical signal from the detector assembly to derive the desired gas-concentration measurement for readout from a display device. Barometric correction means is provided to permit on site calibration by the user of the gas analyzer via an atmospheric pressure calibration indication obtained on the display device by switching the apparatus to a calibrating mode. Apparatus for compensating for broadening of the spectral line of a gas the concentration of which is to be measured by another gas in the sample and for the temperature of the sample gas is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.