Zirconia cell O.sub.2 sensor for respiratory gas analysis
US4995256A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 1989 |
| Grant date | Feb 26, 1991 |
| Priority date | — |
| Expiry date | Mar 20, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/497
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A zirconia oxygen sensor is disclosed which is especially designed for sensing respiratory gases on a breath-by-breath basis. In order to obtain a sufficiently high response time necessary for breath-by-breath gas analysis, a commercially-available zirconia ceramic element is dimensionally tailored to cooperate with a manifold member such that the volume of the gas being analyzed is extremely small, yet uniformly distributed over an internal surface of the zirconia cell. Cooperating with the zirconia cell and the manifold are a set of spring contacts which perform the dual function of providing an electrical terminal and acting as a gas-type seal when the manifold is compressed against the end of the cell.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.