The plant runs 5 production lines with a daily water volume of approximately 800 m³, using tap water treated by filtration, activated carbon adsorption and disinfection. To ensure premium taste, it maintains an extremely strict control range of 0.01–0.1 ppm, tighter than national drinking water standards. Conventional sensors failed to deliver stable low-concentration measurement under fluctuating flow conditions, forcing frequent manual testing that was inefficient and error-prone.

CL4.2 provides an ideal solution with a measurement range of 0.005–2.000 ppm and a resolution of 0.001 ppm, perfectly matching the plant’s low-level control requirements. It is specially designed for surfactant-free drinking and process water, compatible with the plant’s low-turbidity, carbon-treated water without membrane clogging. Featuring Modbus RTU digital output and an IP68-rated 5-pin M12 connector, it integrates directly into the existing PLC system with strong moisture resistance for harsh workshop environments.

Commissioned on disinfected pipelines 8 meters from the chlorine dosing point with stabilized pressure (0.6 bar) and constant flow (25 L/h), the sensor ensures reliable and accurate measurement. Calibration uses the DPD-1 method without zero adjustment, and maintenance is minimal: membrane cap replacement yearly and electrolyte refill every 6 months.

After 8 months of operation, residual chlorine has stably remained within 0.02–0.09 ppm, with a maximum deviation of only 0.003 ppm compared to manual DPD testing. Product qualification rate increased from 99.2% to 99.8%, and taste inconsistency was completely eliminated. The sensor’s slope drift reached only 1.32% over 8 months, ensuring long-term stability.

CL4.2 enables precise, maintenance-friendly residual chlorine control for beverage production, helping manufacturers stabilize product quality, enhance consumer satisfaction and safeguard brand reputation.