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Chlorine Sensor

potentiostatic chlorine sensor SZ283

Potentiostatic Chlorine Sensor model SZ283 follows the amperometric principle and is ideal for measuring Free Chlorine / Residual Chlorine, Dissolved Ozone, and Chlorine Dioxide in water. 

Chlorine Sensor SZ283 Introduction

The SZ283 is a potentiostatic chlorine sensor. This means that it utilises the amperometric principle with a constant potential made through the two annular platinum bands and a reference electrode.

As a potentiostatic chlorine sensor, the SZ283 can make very precise measurements when the chlorine concentration is very low, allowing chlorine controlled processes to be controlled accurately.  The SZ283 is designed to be paired with one of our Chlorine Controllers to allow precision monitoring and control of a number of different processes.

As a glass bodied chlorine sensor, designed and manufactured in a similar way to our pH Electrodes and Redox Electrodes, the SZ823 is able to fit with a wide variety of our pH Electrode holders and our range of sample line cells.

As the SZ283 chlorine sensor utilises the amperometric principle, when the chlorine is measured by the SZ283 - the chlorine is consumed. Therefore when the SZ283 is installed the installation type must ensure that a constant flow is present to ensure precision measurements, we strongly recommend installing the SZ283 directly inline or in a sample line where a constant flow can be guaranteed.

Chlorine Sensor Model SZ283 Features & Benefits

As potentiostatic chlorine sensor, the SZ823 uses the amperometric principle but with a constant potential running through the two platinum bands and the reference electrode. This offers a number of advantages against standard amperometric chlorine sensors.

When the amount of chlorine in a sample is relatively low ( < 1.00 PPM Chlorine) the relationship between the current generated by the chlorine sensor as it consumes chlorine (the chlorine sensor is consuming the chlorine as it is measured) becomes difficult to measure.  This is primarily due to the Redox value of the solution and the solution resistance itself.

With the SZ283 potentiostatic chlorine sensor, the potential running between the measuring electrodes and the reference electrode is controlled electronically in relation to the measured solution by the connected Chlorine Controller. By using an electronically controlled potential a linear current to concentration ratio can be maintained.

There are a number of advantages for using a potentiostatic chlorine sensor over a standard amperometric chlorine sensor.  The main advantage is that the cell requires less frequent calibration.  When a standard amperometric cell is used to measure low concentrations of chlorine, it must be frequently zero and span calibrated to ensure accuracy.

The mounting cap on the SZ823 Chlorine sensor is Ryton with a small flange for mounting the redox electrode into our PES style holders.  In addition it is supplied compete with 3 metres of connecting cable and connection types designed to integrate with our Chlorine Controller range.

Chlorine Sensor SZ283 Specifications

  • Specifications


    Chlorine Sensor

    Model No:- SZ283-10B

    Measurements:- Free Chlorine, Chlorine dioxide, and Dissolved Ozone

    Range:- Dependant on connected controller

    Operating Pressure:- 10 Bar at 20°C

    Electrode Type:- Potentiostatic

    Reference:- Gel filled with annular reference junction.

    Junction:- Single Junction

    Dimensions:- 110 mm Long x 12mm ø

    Additional:- 10 Feet connecting cable and BNC plug as standard

  • Features


    • Provides accurate measurements of chlorine concentration, dissolved oxygen concentration and ozone concentration in a solution.
    • Ideal for mounting directly inline to provide online chlorine meausrements or in a sample line - anywhere a constant flow is present.
    • Simple to install and easy to maintain, ideal for sanitation applications in swimming pools, drinking water, and other areas of water treatment and water quality analysis.
    • The SZ283 utilises the potentiostatic principle of amperometric chlorine measurements, giving precision measurements at low chlorine concentrations and significantly reducing the amount of time spent on calibration.
  • Data Sheets

    Data Sheets


More Information