Apparatus for measuring the electrical conductivity of a liquid medium
US9354193B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 2012 |
| Grant date | May 31, 2016 |
| Priority date | — |
| Expiry date | Jun 9, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Device for measuring electrical conductivity of a liquid medium comprising constant voltage means, connected to a first electrode arrangement for injecting an alternating signal into the liquid medium, detection means, connected to a second electrode arrangement coupled via the liquid medium, for generating a measurement signal influenced by the electrical conductivity with a clock frequency (CLK) of the alternating signal, and evaluation means which from a current-proportional injection signal of the current injected by the first electrode arrangement into the liquid medium and from the measurement signal generate a conductivity signal of the liquid medium. The constant voltage means are made in an individual circuit branch which has commutator means for the first electrode arrangement and ohmic resistance means in a series connection, the current-proportional injection signal being tapped as a voltage drop over the resistance means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.