Process and apparatus for measuring the opacity in gases
US6570655B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 24, 2000 |
| Grant date | May 27, 2003 |
| Priority date | — |
| Expiry date | Apr 1, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/3504
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A process is provided for measuring the opacity in gases, especially in exhaust gases or in the atmosphere, at or near the maximum of the eye sensitivity in the green wavelength range with a central wavelength lying between 550 and 570 nm. In order, in a simple manner, to separately determine the components which are responsible for clouding in the visible wavelength range, or to make a correction possible by taking into consideration further components that have an effect in the visible range, the opacity in at least one second wavelength range which is located in the spectral between 200 nm and 2&mgr;, and which overlaps at most slightly with the first wavelength range is additionally measured.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.