Construction And Function - ProMinent DULCOTEST CDP 1 Betriebsanleitung

Construction and Function

3
Construction The CDP chlorine dioxide sensor is a membrane covered dual electrode
measurement sensor. It essentially consists of the membrane cap and the
electrode shaft. The membrane cap filled with electrolyte forms the
measuring chamber. The electrodes in the electrode shaft project into the
measurement chamber. The sample water passes over the micro-porous
membrane and the gases pass through the membrane into the
measurement chamber. The amplifying electronics are situated above the
electrodes in the electrode shaft, above which is located the two-wire
terminal.
An external sensor gauge Pt 100 compensates for temperature influences.
Function The chlorine dioxide passes through the membrane into the measuring
chamber and delivers an electron to the collector. The voltage between the
collector and reference electrode causes an electrical current to be
produced. This current is proportional to the chlorine dioxide content
present within the sample. The amplification electronics transform the
current into an un-calibrated standard output signal. This is taken up by the
two-wire terminal and transmitted to the controller.
Fig. 1
Sensor
construction
20
Construction and Function
Cable bush
PG-7 threaded connector
Tensioning ring
Electrode shaft
Rubber seal
Membrane cap
Adapter
2-wire connector
ProMinent
®