The Zero Liquid Discharge system monitors and controls contaminant concentrations in rinses from processes such as degreasing, pickling, chromating, and phosphating, using conductivity and pH measurements. The system also introduces fresh water automatically as needed. The RINSEGUARD unit, specifically designed for metal finishing lines, evaluates and supplies only the necessary amount of water to ensure optimal rinsing. By using the CIE RINSEGUARD system, water consumption—and associated costs—can be reduced by up to 30%, preventing excessive rinse water flow rates.