Micro fuel-cell oxygen gas sensor
US5256273A · kind A · utility
3Cited by
4References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 7, 1992 |
| Grant date | Oct 26, 1993 |
| Priority date | — |
| Expiry date | Apr 7, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/404
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An oxygen sensor for measuring oxygen in the ppb range. The sensor comprises an electrochemical cell. The oxygen is metered to the cathode based on gaseous phase diffusion to provide a measurement proportional to volumetric concentration. Hydrogen is metered to the anode in an amount in excess of the oxygen being reduced at the cathode. A current is generated which is linear to the volumetric concentration of the oxygen in the sample gas. The concentration of the oxygen is measured based on current generated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.