Capacitive liquid level sensor and liquid sensor assembly
US11976958B2 · kind B2 · utility
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9Claims
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Key dates
| Filing date | Dec 12, 2019 |
| Grant date | May 7, 2024 |
| Priority date | — |
| Expiry date | Feb 6, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/266
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A capacitive liquid level sensor (1). The sensor comprises a sensor body in the form a tongue with a freely depending portion (3) extending to a distal tip (6) at its lowermost end. A set of spaced capacitive electrodes (7) extend along the tongue towards the distal tip. In use, when the distal tip (6) of the tongue is immersed in a body of liquid, the capacitance between the electrodes (7) changes depending on the depth of the body of liquid. The width of the tongue increases in the downward direction at least for part of the bottom half of the freely depending part of the tongue.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.