SensorexPRODUCT INSTRUCTION SHEETFree Chlorine Amperometric 4-20mA SensorsProduct InstructionsSection 1.0F1G.1Theory of Operation1.0 Free Chlorine DefinedFree Chlorine or "freely active chlorine"is defined as the sum of molecu-lar chlorine(Cl2),hypochlorous acid (HOCl)and hypochlorite ions(OCI)Molecular chlorine occurs at pH values
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