Capacitive level sensor and method of measuring the level of a medium
US10969264B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 21, 2018 |
| Grant date | Apr 6, 2021 |
| Priority date | — |
| Expiry date | Mar 16, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/80
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A capacitive level sensor (10) for measuring the level of a medium (14) in a container (12) is provided having a probe (16) for immersion into the medium (14) that has at least one measurement electrode (26) for a capacitance measurement and having a measurement and evaluation unit (20) that is configured to determine a capacitance at the measurement electrode (26) and to calculate a level from it. In this respect, the probe (16) has at least one reference electrode (28) for a capacitance measurement independent of the level to thus compensate environmental influences on the capacitance measurement at the measurement electrode (26).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.