Removal of gases disturbing the measurements of a gas detector
US5091649A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 6, 1990 |
| Grant date | Feb 25, 1992 |
| Priority date | — |
| Expiry date | Jul 6, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/0233
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a gas detector for measuring one or more hydrocarbons or some other gas having its infrared absorption spectrum partially or entirely overlapping with water and, in addition, carbon dioxide and/or nitrogen oxide. The gas detector comprises a radiation source (1), a measuring chamber (3), a reference chamber (4), the electromagnetic radiation coming from the radiation source passing through said chambers, and a radiation detector (5). A beam passing from radiation source (1) both to measuring chamber (3) and to reference chamber (4) and from these chambers further to detector (5) travels in a space (14) which is provided with both a carbon-dioxide removing material (11) and a water-removing material (12). The invention relates also to a method for absorbing the carbon dioxide contained in said gas detector space (14) or in a part of this space into a carbon-dioxide removing material (11) and for absorbing the water into a water-removing material (12).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.