Intelligent Online Free Chlorine Analyzer W771 with CL2.2 Sensor for Sea Water The Inline Residual Chlorine Analyzer is equipped with German-made CL2.2 sensor, which uses a coated amperometric dual-electrode system to detect only hypochlorous acid (HOCL) in water, with automatic temperature compensation, analog/digital signal output, no zero calibration, and slope loss affected by pH; It applies to high-salt water for disinfection monitoring of drinking water, swimming pool water, slightly polluted process/cooling water, and features high-salt resistance, stable dual-electrode measurement with fast response, easy operation, and environmental demands. Application Fields Core adaptation to high-salt concentration water bodies, with specific scenarios as follows: 1. Basic Environment: Brine or seawater with a salt concentration of 3.5%~26% (conductivity > 50mS). 2. Specific Applications: ◦ Disinfection monitoring of drinking water and swimming pool water; ◦ Disinfection monitoring of slightly polluted process water and cooling water treatment; ◦ Must be used with a dedicated flow cell to ensure the water flow meets requirements. Technical Parameters Category Detailed Parameters Basic Parameters Measuring Parameter: Free chlorine; Applicable Chlorinating Agents: Inorganic chlorine compounds (NaOCl, Ca(OCl)₂, chlorine gas, membrane electrolytic chlorine); Diaphragm-free electrolytic chlorine is prohibited Measurement Performance Measurement Range: 0.005~2 mg/L (ppm, resolution 0.001 mg/L);

0.05~20 mg/L (ppm, resolution 0.01 mg/L); Response Time T90: Approximately 30 seconds Environmental Conditions Water Temperature: 0~45℃ (no condensation); Ambient Temperature: 0~55℃; pH Operating Range: 6~8; Flow Rate: 15~30 L/H (in flow cell) Approximately 60% slope loss at pH=8, and approximately 80% at pH=8.5 (with pH=7 as the reference); pH fluctuation must be maintained < 0.05 Signal & Power Supply Output Signal: 4~20mA/0~±2V (analog), Modbus RTU (digital); Power Supply Voltage: 12~30VDC (2-pin terminal), 9~30VDC (5-pin M12) Connection Method Interfering Factors Chlorine Dioxide (ClO₂):...