Method and apparatus for detection of fluid level in a container
US7127943B1 · kind B1 · utility
15Cited by
21References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 19, 2000 |
| Grant date | Oct 31, 2006 |
| Priority date | — |
| Expiry date | Jan 19, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/268
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A fluid level sensor is disclosed having first and second vertically and horizontally nonoverlapping electrode plates for placing on a wall of a fluid container. Most preferably, the plates are also vertically spaced from each other. The capacitor plates are driven by a high frequency square wave. By forming nonoverlapping plates and driving them using a high frequency, the level of a fluid within the container, particularly viscous fluid, is more accurately detected. Control and detection circuitry is also disclosed to trigger an alarm if the fluid level drops below a critical level within the container.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.