Hydrogen sensing process
US6638416B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 2001 |
| Grant date | Oct 28, 2003 |
| Priority date | — |
| Expiry date | Nov 24, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A hydrogen sensor and process for measuring hydrogen gas concentrations includes a pump cell and a measuring cell. The pump cell includes a first conducting electrolyte layer having a top and a bottom surface, and an electrode disposed on the top and bottom surfaces, wherein the top electrode is in communication with an unknown concentration of hydrogen gas. The measuring cell includes a second conducting electrolyte layer having a top and a bottom surface, and an electrode disposed on the top and bottom surfaces, wherein the bottom electrode is in communication with a reference gas source. A diffusion-limiting barrier is disposed between the pump cell bottom electrode and the measuring cell top electrode, wherein hydrogen diffusion through the diffusion-limiting barrier is controlled by a Knudsen diffusion mechanism at hydrogen concentrations greater than about 40%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.