Endress+Hauser Analytik Jena Multi X 2500 - Fig. 27 Sensor Electrode; Fig. 28 Pt Electrode with Salt Bridge (Generator Cathode)

multi X 2500 Function and layout of the multi X 2500
35
The sensor electrode must be permanently wetted to prevent the diaphragm from
dehydrating. During long measurement times or extended storage inside the storage
container the diaphragm and the silver ring must be completely immersed in the
electrolyte solution.
Fig. 27 Sensor electrode
1 Reference electrode
2
Refilling port for internal electrolyte (Na
2
SO
4
)
with rubber plug
3 Diaphragm
4
Silver ring (sensor)
A pair of generator electrodes consisting of a platinum cathode with salt bridge and a
silver anode is used to produce the silver ions required for chemical precipitation.
Fig. 28 Pt electrode with salt bridge (generator cathode)
1 Pt electrode with salt bridge,
complete
2 Salt bridge
3
Pt electrode
4
Septum with opening (for attaching the
Pt electrode to the salt bridge)
Generator electrodes