With LCD controlling system,3 way water quality sensor,timing and quality dispensing,single stage RO system,2 pump and Ionpure^? EDI module,Edi-S ultrapure water system is superior choice of ultrapure water for high grade experiments. With tap water inlet,the largest capacity is 240 liters per day. It can produce deionized water and ultrapure water. The deionized water is stable grade II pure water with resistivity>5MΩ.cm(25°C),TOC<30ppb,and the lowest running cost. It completely meets the requirements of general chemical or biological experiments for pure water,and is up to the standard of ISO 3696(Type II),ASTM D1193 (Resistivity of type II and TOC),and the requirements for pure water of CLSI (NCCLS) clinical laboratory,GB/T6682,America,Europe,Japan′s pharmacopeia. And the ultrapure water′s resistivity absolutely reaches to 18.2MΩ.cm. It completely meets the highest grade I standard of ASTM,CAP,CLSI,EP and USP.