ProMinent DULCOTEST CGE 2-mA-10 ppm Operating Instructions Manual page 23

Design and function
Function The CGE chlorine sensor is a membrane capped amperometric two-electrode
probe. A platinum cathode is used as the collector and a silver-coated anode
is used as the counter electrode (principle of amperometric measurement).
The sensor signal is almost independent of pH in the probe's operating range.
The current conduction is converted into an output signal by the amplifier
electronics and displayed.
The measured signal of the CGE probe follows DPD-1 determination. The
chlorine content available for disinfection can thus be determined.
Fig. 2
Sensor
designs
® 23
ProMinent