Humidity sensor formed on a ceramic substrate in association with heating components
US7635091B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 21, 2005 |
| Grant date | Dec 22, 2009 |
| Priority date | — |
| Expiry date | Aug 22, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/223
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A humidity sensor system and method include a ceramic substrate upon which a heater can be printed. A humidity sensor can be mounted above and in contact with the heater, or the heater can be mounted one side of the substrate and the humidity sensor on the opposite side of the substrate, such that the heater heats the humidity sensor, raising its temperature above the dew point of the ambient air such that moisture does not condense on the humidity sensor, thereby preventing the humidity sensor performance from being affected. The heater can be configured as a resistive heater, and the humidity sensor can be configured from one or more humidity-sensing die. A thin film platinum RTD (Resistance Temperature Detector) component can be printed upon the substrate in association with the humidity sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.