The PC2100 TDS Control Option is a sophisticated and reliable programmable controller designed to automate and optimize water chemistry management. Featuring automatic maintenance of pH and ORP levels, and optionally integrating a free chlorine sensor with direct readings in PPM or mg/l, this controller ensures precise chemical balance. The unit includes programmable super-chlorination and chemical savings cycles and displays the Langelier Saturation Index for comprehensive water quality monitoring. The 8-line main screen provides a clear overview of all process functions, allowing operators to easily supervise and adjust settings. The intuitive front panel keypad facilitates straightforward navigation through menus, submenus, and all operational adjustments.