Gas-sensor arrangement for detecting target-gas concentration
US9709498B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 7, 2015 |
| Grant date | Jul 18, 2017 |
| Priority date | — |
| Expiry date | Jul 7, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/061
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A gas-sensor arrangement for measuring a target-gas concentration has first and second NDIR emitters to one side of a space containing the target gas and projecting respective first and second beams of infrared light through the space. An it receiver on the other side of the space and irradiated by the first and second beams for emitting first and second outputs respectively corresponding to the first and second beams and together forming a receiver signal corresponding to radiation received from the first and second beams. One of the emitters is optically farther from the receiver than the other of the emitters. A filter between the receiver and the space is traversed by the first and second beams and permeable only to radiation of a wavelength range corresponding to the target gas. A controller connected to the radiation receiver calculates the target-gas concentration on the basis of the receiver signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.