A residual chlorine sensor is an instrument used to measure the concentration of residual chlorine in water. It detects the electrochemical signal generated by residual chlorine in water through a sensor and converts the signal into a residual chlorine concentration value.Residual chlorine sensors usually use electrochemical methods. The sensor contains a working electrode and a reference electrode. When a water sample flows through the sensor, the residual chlorine molecules in the water diffuse onto the surface of the working electrode and a redox reaction occurs. Residual chlorine analyzer can be used in drinking water treatment plant, swimming pools, food processing industry and industrial water.
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