Water treatment of swimming pools, thermal water... (clear water, sea-water)

Measured parameter: Free chlorine
Chlorination additives: Inorganic compounds, such as NaOCl - Ca(OCl)₂ - gaseous chlorine, chlorine by electrolysis, plus stabilizer
isocyanuric acid up to 500 mg/l .
Surfactants: partial tolerance
Measuring system: Closed cell with 3 electrodes and electrolyte
Supply voltage 12 ... 30 V DC, (Load = 500 to 900Ω)
Output signal 4 ... 20mA, screw connectors (2 x 1 mm²)
pH operating range Between 4 and 12 pH (low incidence of pH variations)
Interferences Incidence of ClO₂ and O₃ on measuring signal