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1.0 Introduction
The Walchem non-membrane chlorine and chlorine dioxide sensors
consist of an amperometric sensor assembly, cable and a flow cell.
Assembly of these parts is required, so please read these instructions
carefully. The sensor is capable of measuring the disinfectant in drinking
water or drinking water quality water.
Sensor
The sensor assembly includes the sensor body, a 50-ml bottle of electrolyte
fill solution, and special abrasive emery paper. Make sure that all parts are
included.
The sensors are open (not-membrane covered) amperometric 3-electrode
types. The measuring and counter electrode are in direct contact with the
measuring water. The reference electrode is separated from the measuring
water by a housing which contains an electrolyte. Together with the
electrolyte, an electrical signal is generated at the measuring electrode
which is proportional to the concentration of the disinfectant, and
amplified by the electronics of the sensor. The measuring signal is
temperature compensated.
Flow Cell
The flow cell consists of a translucent flow cell body, mounting nut and o-
ring, washer set and o-ring. Make sure that all parts are included.
The flow cell is required. The sensor will not read accurately if it is not
installed in the flow cell, with a steady flow rate between 20 and 100 liters
per hour, at an operating pressure of 8 atmospheres or less.
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