Transmissometer having solid state light source
US4937461A · kind A · utility
23Cited by
3References
16Claims
0Family size
Inventor
Key dates
| Filing date | Aug 22, 1988 |
| Grant date | Jun 26, 1990 |
| Priority date | — |
| Expiry date | Aug 22, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/534
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An improved transmissometer and optical assembly therefor contains a solid state light source preferably a light emitting diode. The ligh source emits a low level light beam that is split, part of which is passed through a gaseous sample then directed to a detector while the otehr part is directed to a second detector. Electronic components are provided to use signals from the detectors to control the light source and determine opacity of the sample.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.