Gas analyzer with arrangement for spray-cleaning optical element
US5720650A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1997 |
| Grant date | Feb 24, 1998 |
| Priority date | — |
| Expiry date | Feb 13, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/0029
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A gas analysis apparatus for analysis of sample gas wherein the apparatus has a mechanism for cleaning optical elements such as reflectors and windows in the apparatus is provided. The gas analysis apparatus includes a light source for emitting light, a body having an isolated cavity in which the light emitted by the light source propagates, a detector for analyzing light scattered by the sample gas in the isolated cavity, and a spraying system connected to the body to spray a sublimable substance. The isolated cavity has one or more optical elements each with a surface. The spray of the sublimable substance is directed onto such a surface for in situ removal of contaminants. The body has a sample inlet port for introducing the sample gas into the cavity and an outlet port for venting gas from the cavity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.