Temperature control for chemical sensors
US5406829A · kind A · utility
7Cited by
19References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 19, 1994 |
| Grant date | Apr 18, 1995 |
| Priority date | — |
| Expiry date | Apr 19, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D23/1928
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A temperature control system for acoustic wave chemical sensors monitors the frequency output from a reference sensor packaged within a heat conductive case with a test sensor. Since the frequency output fluctuates as a function of temperature, variations in frequency from a nominal value representing a desired steady state temperature for the sensors are detected and used as a control signal for a heating element attached to the heat conductive case.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.