pH sensor with internal solution ground
US6894502B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 2002 |
| Grant date | May 17, 2005 |
| Priority date | — |
| Expiry date | Dec 18, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/4035
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to an internal solution ground for primary use with a pH sensor, and preferably with a multi-sensing instrument monitoring a pH sensor and one or more additional secondary sensors having non-isolated circuits. In one aspect, a pH sensor assembly includes a pH electrode, a reference electrode, and an internal solution ground wire. The internal solution ground wire shares a liquid junction with the reference electrode but is protected by the reference fill solution. In one embodiment, the internal solution ground can be electrically isolated through a capacitor or, alternately, a capacitor and resistor in parallel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.