Gas detectors and gas analyzers utilizing spectral absorption
US4746218A · kind A · utility
55Cited by
5References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 5, 1986 |
| Grant date | May 24, 1988 |
| Priority date | — |
| Expiry date | Sep 5, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/0231
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Instrumentation to detect the presence of, or to measure the concentration of, a gas or pollutant in a gaseous environment. With the use of gas filter correlation techniques and energy beams having suitable wavelengths, the presence and concentrations of these can be detected and measured, not only in flowing streams such as in exhaust stacks, but above a ground area and around its perimeter. A calibration means using a retrodirective reflector is also shown.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.