Optical gas and/or particulate sensors
US8692997B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 24, 2011 |
| Grant date | Apr 8, 2014 |
| Priority date | — |
| Expiry date | Aug 31, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/7786
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A gas or particulate sensor is provided for the detection of at least two target gases and/or particulates. The sensor comprises: a chamber for containing a gas sample under test; a first optical measurement channel configured for the detection of a first target gas or particulate within the gas sample, and a second optical measurement channel configured for the detection of a second target gas or particulate within the gas sample, each optical measurement channel comprising a respective optopair which comprises a radiation source adapted to emit radiation and a radiation detector adapted to output a signal in response to detected radiation; and focusing optics able to form an image of an object. At least the first optical measurement channel is configured such that the radiation detector of the respective optopair receives via the focusing optics an image of the corresponding radiation source, whereby the radiation received from the radiation source by the radiation detector is modified by the first target gas or particulate present in the gas sample such that the output signal from the radiation detector provides information as to the presence of the first target gas or particula…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.