Fluid level detection system and method
US10240966B2 · kind B2 · utility
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10Claims
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Key dates
| Filing date | Jun 27, 2014 |
| Grant date | Mar 26, 2019 |
| Priority date | — |
| Expiry date | Jan 17, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/261
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A fluid level detecting system provides an input signal at a specific frequency to a sample in a container. A probe contacts the energized sample and provides a signal to a level sensing circuit. The level sensing circuit amplifies the signal from the probe and then bandpass filters, tuned to the specific frequency, the amplified signal. This filters out extraneous signals received from, for example, a cover on the container, and specifically identifies when the probe has contacted the sample fluid by comparing the filtered signal to threshold levels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.