CHEMTROL PC 3000 — Displays ORP, sanitizer/PPM, pH, temperature, and Langelier saturation index. All functions can be easily modified through a series of submenus including probe calibration, automatic probe cleaning, diagnostic probe monitoring, proportional feed, automatic superchlorination, energy saver and water chemistry saver programs and RS-232 communication port for data download capabilities. Includes: PC by-pass line assembly with PC safety flow switch, ORP, pH and temperature probes. Sensor cell cabinet ordered separately. 5 Year Electronics Warranty.