Drift compensated ion sensor
US9964509B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 20, 2015 |
| Grant date | May 8, 2018 |
| Priority date | — |
| Expiry date | May 15, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/413
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ion sensor for sensing an ion concentration in a bulk solution comprises a reference electrode embedded in an reference electrolyte solution, and a first ion-selective electrode. The ion sensor moreover comprises a second electrode sensitive to the reference ions or to an ion different from the ion to be measured, whereby the second electrode is in direct contact with the bulk solution when the ion sensor is immersed therein. The potential difference between the first electrode and the reference electrode is a measure for the ion concentration in the bulk solution and is corrected with the potential difference between the second electrode and the reference electrode to compensate for the drift of the reference electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.