Temperature sensor and its manufacturing method
US5497139A · kind A · utility
16Cited by
3References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 23, 1994 |
| Grant date | Mar 5, 1996 |
| Priority date | — |
| Expiry date | Sep 23, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49085
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A temperature sensor includes a thermistor in a heat-resistant cap and lead wires electrically connected to the thermistor. The thermistor is comprised of materials defined by the following chemical formula: EQU (Al.sub.1-x-y Cr.sub.x Fe.sub.y).sub.2 O.sub.3 wherein 0.05.ltoreq.x+y.ltoreq.0.95, and 0.05.ltoreq.y/(x+y).ltoreq.0.6. The thermistor may also include CaO, rare earth oxide, ThO.sub.2 or ZrO.sub.2. The thermistor has an excellent long term resistance stability, which is important in high temperature applications of the temperature sensor, such as measurement of automobile catalytic converters temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.