Method and apparatus for detecting phase boundaries and correspondingly equipped laboratory device
US9335200B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 2010 |
| Grant date | May 10, 2016 |
| Priority date | — |
| Expiry date | Oct 13, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2035/1025
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device for detecting a phase boundary in a liquid tank a sensor that can be advanced in the direction of the phase boundary in the liquid tank. A circuit processes an output signal of the sensor to detect a change in capacitance and has a first channel with a first filter module to filter out a first signal having a short pulse width from the output signal and a second channel having a second filter module to filter out a second signal having a greater pulse width from the output signal. A controller module with comparator module determines whether the first signal reaches a first threshold value and a processing module determines whether the second signal meets predefined second signal criteria.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.