Fluorescent gas analyzer
US4469946A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 1982 |
| Grant date | Sep 4, 1984 |
| Priority date | — |
| Expiry date | Apr 7, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/0696
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A fluorescent gas analyzer for analyzing gases by the fluorescence method. A flashtube which is operated in its pulse mode is used as a light source. First and second optical detectors respectively detect light of a first and second wavelength range, the light of the first wavelength range being emitted by the light source and the light of the second wavelength range being emitted from a gas sample irradiated by the light source. A pair of integrators respectively integrate the outputs of the first and second detectors. Processing means, including sample and hold circuits and a synchronous detector, are used to further process the signals so that the system output is independent of deterioration of the light source and fluctuations in the strength of the light source output and independent of stray capacitance effects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.