Hydrogen sensor apparatus and method of fabrication
US6535658B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 15, 2000 |
| Grant date | Mar 18, 2003 |
| Priority date | — |
| Expiry date | Sep 8, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/241
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A porous glass rod is treated to include tungsten oxide and palladium in an arrangement that is sensitive to hydrogen to produce a color change that is a function of the hydrogen concentration. The rod is attached to the tip of a double fiber into one of which light is launched by a light source. A detector at the end of the second fiber is responsive to light reflected by the rod. The process for forming the rod includes the steps of doping the glass with a tungsten compound and a palladium compound with intervening and subsequent heating steps to bond the tungsten oxide and palladium to available oxygen atoms of the porous glass.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.