System and method for temperature measurement
US8092084B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2008 |
| Grant date | Jan 10, 2012 |
| Priority date | — |
| Expiry date | Jun 13, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K7/24
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for precision thermal measurement and control, especially for bioreactors, as well as the correction of temperature sensitive probes such as pH and dissolved oxygen. Typical control requirements are +/−0.1° C. The thermal measurement circuit converts a sensor output to a high level voltage or current with great accuracy and provides noise immunity and sensor isolation. While digital outputs from sensor converters can have the greatest noise immunity, the noise associated with digital circuitry may contaminate low level sensor signals so in many cases an analog sensor converter is preferred because of low noise generation, especially if the converter is near the sensor. The circuit is low cost, reliable, generates minimal heat is immune to, and does not generate noise, and requires minimal calibration effort.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.