Device for checking the level of a liquid in a tank
US4163391A · kind A · utility
37Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 28, 1977 |
| Grant date | Aug 7, 1979 |
| Priority date | — |
| Expiry date | Sep 28, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/246
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device for checking the level of a liquid in a tank, for example a car fuel tank, has an electrical resistance probe partly immersed in the liquid and energized with a constant current. The voltage across the probe at switching on is stored and used as a reference for comparing with the increased voltage after the element has been heated to a value dependent on the length of resistor cooled by the liquid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.