Amperometric gas sensor to selectively determine the partial pressures of a gas
US5322601A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 14, 1992 |
| Grant date | Jun 21, 1994 |
| Priority date | — |
| Expiry date | Apr 14, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/4073
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention concerns as amperometric gas sensor for the selective deteration with high accuracy of a gas partial pressures. Such a gas sensor includes a solid electrolyte and inert electrodes. The solid electrolyte, contained in the sensor, is selected in such a way that when an electrical current or voltage is applied, ions contained in the electrolyte form a reaction product with the gas to be determined in a secondary equilibrium reaction and with generation of an electrically measurable signal. Preferred solid electrolytes are Na.sup.+ -.beta." aluminum oxide, NASICON, cubic stabilized zirconium oxide and polycrystals of tetragonal zirconium oxide. A method for the selective determination of gases using such electrodes also is described. Preferably an electrical current or voltage source shall be used which feeds a periodic, especially a sawtooth or sinusoidal signal, to the solid electrolyte, as a result of which the formed reaction product is decomposed to the same extent it was previously built up.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.