Electro-Chemical Devices’ series of sensors for chlorine analysis are designed to fit into chlorine monitoring systems in a variety of aqueous environments. The FCA-22 Free Chlorine Sensor, TCA-22 Total Chlorine Sensor and CDA-22 Chlorine Dioxide Sensor are high-accuracy amperometric sensors for fresh water applications including monitoring of industrial cooling and rinse water, drinking water and wastewater. The FCA-22 measures free residual chlorine from 0.05 to 20.0 ppm Cl2, 5 to 9 pH and at temperatures from 32 to 122 F (0 to 50 C). The TCA-22 is designed for use in drinking water, industrial cooling and rinse water, wastewater or other fresh water samples containing chlorine in the range of 0-20 ppm, operating at a temperature range of 0-45 C. It is for application in municipal water systems and a range of water-based processes in the chemical, electronics, electric power, food & beverage, oil & gas, pharmaceutical, pulp & paper and many other industries. The CDA-22 Chlorine Dioxide Sensor has a gold cathode and silver chloride anode and PTFE membrane. It is designed to measure chlorine dioxide in concentrations ranging from 0.05-20 ppm CIO2 and operates at 0 to 50 C (32 to 122 F). It is for applications in municipal water systems, industrial cooling and rinse water, wastewater or other fresh water samples.