Differential current thermal mass flow transducer
US5461913A · kind A · utility
28Cited by
7References
41Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 23, 1994 |
| Grant date | Oct 31, 1995 |
| Priority date | — |
| Expiry date | Jun 23, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/6847
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The disclosed mass flow transducer is of the type including a balanced bridge comprising two, substantially identical, thermal elements forming two sides of the bridge between the top and the bottom of the bridge, the two elements being adapted to be positioned in two regions of a laminar flow tube in a symmetrical tandem arrangement so as to sense flow through the tube, one element being upstream from the other. The preferred transducer includes control means for monitoring the voltage at the top and bottom of the bridge and monitoring the current required to maintain the node between the thermal elements at virtual ground.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.