H87.0.0X.6C-01
Operating manual G 7500 Series
page 12 of 34
6.1.1 Design
1. Coaxial cable
2. Reference electrode
3. Measuring electrode
4. Refill opening
5. Electrolyte
6. Internal buffer
7. Diaphragm
8. Glass membrane / source layer
The diaphragm, which establishes a connection between the electrolyte and the liquid
to be measured, can be designed in different ways. Clogging or soiling of the
diaphragm is a frequent cause of a malfunctioning or sluggish electrode. Always
handle the glass membrane with extreme care. The so-called source layer forms
there. This is crucial for the measurement and must always be kept moist.
There are also electrodes with integrated temperature sensors.
6.1.2 pH electrode
Normally, so-called pH single-rod measuring chains are used. They
include all necessary components that are integrated in an electrode.
