Method and device for detecting failures in inductive conductivity measurements of a fluid medium
US8508234B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 13, 2011 |
| Grant date | Aug 13, 2013 |
| Priority date | — |
| Expiry date | Nov 26, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/023
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Exemplary embodiments of the present invention are directed to methods and devices for detecting open-circuit and short-circuit failure in an electromagnetic (inductive) measurement of the conductivity of liquids and on the sensor and cable wiring. An electromagnetic measurement of the conductivity of a liquid is performed by immersing a sensor into the liquid, wherein the sensor includes at least 2 toroidal cores, one of them carrying an excitation coil and the other carrying an induction coil. When an AC excitation voltage is applied to the excitation coil, an induced current or voltage can be measured in the induction coil which is proportional to the conductivity of the measured liquid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.