PH glass electrode
US5567291A · kind A · utility
4Cited by
6References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 5, 1995 |
| Grant date | Oct 22, 1996 |
| Priority date | — |
| Expiry date | Jun 5, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/36
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In the pH glass electrode comprising a double-walled glass tube in which an electrical screen is provided between the walls, the inner glass tube is sealed at one end with a glass lid and at the other end with a pH-sensitive glass membrane which forms, with the glass tube, a cavity which is filled with internal reference solution and into which the reference electrode extends. A feed tube (10) and a drain tube (11) which are passed through the lid (5) and intended for the internal reference solution (8) are disposed in the internal glass tube (3), the drain tube (11) extending down to the lowest point in the cavity (7).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.