Chlorine sensor with membrane-covered, amperometric 2-electrode system. For the measurement of free inorganic chlorine at constant pH.

• Measured variable(s): NaClO (sodium hypochlorite), Ca(ClO)₂ (calcium hypochlorite), Cl₂ (chlorine gas), chlorine generated by membrane electrolysis
• Calibration: at the controller, via analytical chlorine determination by DPD 1 method
• Interferences: ClO₂ is recorded with a factor of 9 of its reading; O₃ is measured; malfunctions may occur with membraneless chlorine electrolysis
• pH range: 6-8
• Pressure range: 0‒1 bar, no pressure surges and/or fluctuations permitted
• Temperature range: 0‒45 °C (no ice crystals in the water)
• Integrated automatic temperature compensation
• Response time: T90 approx. 30 seconds
• Flow rate: approx. 30 l/h, low flow dependence
• Shaft length: standard 175 mm (mA version up to 220 mm)
• Connection: standard 4-pin plug; mA version 2-pole terminal, M12 socket or modbus RTU with M12 socket
• Material: PVC-U, semi-permeable membrane