Unicable liquid level sensing system
US4603580A · kind A · utility
16Cited by
10References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 20, 1985 |
| Grant date | Aug 5, 1986 |
| Priority date | — |
| Expiry date | Feb 20, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/22
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Double-junction thermocouple sensors located at axially spaced measurement zones within an elongated probe are interconnected in series to produce a combined output from differential signals generated by the sensors in response to unequal heating of the junctions. Axial heat flow between measurement zones is controlled to modify the combined output in a corrective direction with respect to a linear function of liquid level between the measurement zones.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.