RST-158 COD Digester Apparatus Body made out of thick mild steel finished with powder coating. Heating blocks made of aluminium die casting. Temperature rage from ambient to 150,200 deg. C. Designed with glass reaction vessels and air condensers. Supplied with stand to accommodated vessels. Temperature is controlled by Dual Display Microprocessor PID Digital Temperature Indicator cum Controller & 99 Hr Digital Timer. Workable on 220 V AC 50 Hz Single Phase. Capacity : 1) 15 Samples 2) 20 Samples 3) 25 Samples