The Chemtrol PC2100 Temp Control Option is a versatile and reliable programmable controller designed to manage and optimize water chemistry and temperature. This advanced controller maintains automatic control of pH and ORP levels, with the option to include a free chlorine sensor providing direct readings in PPM or mg/l. It features programmable super-chlorination and chemical savings cycles and displays the Langelier Saturation Index for a complete view of water quality. The 8-line computer-like main screen allows operators to efficiently monitor and adjust all process functions.