Chlorine analysis with the Cl module
multi EA 5000
54
Figure 31Equipped measuring cell
1 Gas inlet tube with screw connec-
tion (for measuring gas)
2 Adapter for exhaust connection
3 Sensor electrode with pre-amplifier
4 Opening for direct injection, with
plug
5 Silver electrode
6 Platinum electrode (with salt
bridge)
7 Measuring cell
Sensor electrode
The sensor electrode combines the indicator and reference electrodes
.
A 0.6 mol/l
sodium sulfate solution is used as an internal electrolyte which is filled via the refilling
port.
The sensor electrode must be permanently wetted to prevent the diaphragm from dehy-
drating. During long measurement times or extended storage inside the storage con-
tainer, the diaphragm and the silver ring must be completely immersed in the electrolyte
solution.
