Optical gas sensing apparatus with explosion-proof enclosure
US9546950B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 26, 2014 |
| Grant date | Jan 17, 2017 |
| Priority date | — |
| Expiry date | Sep 26, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/0236
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical gas sensing apparatus includes an explosion-rated device electronics enclosure. An explosion-rated sensing enclosure has a light transmitting element to allow light to pass out of and into the sensing enclosure. The sensing enclosure is operably coupled to the explosion-rated device electronics enclosure by a feed-through. In one aspect, an internal volume of the sensing enclosure is less than or equal to about one fiftieth of the volume of the explosion-rated device electronics enclosure. In another aspect, the thickness of the light transmitting element is less than or equal to about 3 millimeters. A light source is disposed within the sensing enclosure and is operably coupled to the device electronics. A detector is disposed within the sensing enclosure and is also operably coupled to the device electronics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.