Absorption biased single beam NDIR gas sensor
US8729475B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 29, 2013 |
| Grant date | May 20, 2014 |
| Priority date | — |
| Expiry date | Oct 29, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/036
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An Absorption Biased (AB) methodology for NDIR gas sensors is used with a single infrared source and a detector to detect a single gas of interest by using a motion device to change the path length between that of the signal and reference channels. As in the case of the AB designed NDIR gas sensor, the ratio of the output of the Signal channel, measured during location arrangement X, over that of the Reference channel, measured during location arrangement Y, will be used to process the gas measurement. Multiple gases of interest can be detected by using one detector to detect multiple gases and/or by locating a second detector to detect multiple gases more distant from the source than the first detector, thereby creating longer path lengths for the second detector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.