To determination of Chemical oxygen Demand. It is a solid state block heated unit with provision for samples to be digested at a time in 38 mm. Dia reaction vessels with 20 ml sample size to heat at temp. of 150°C ± 10°C controlled by MICROPROCESSOR BASED DIGITAL TEMP. INDICATOR-CUM CONTROLLER. It has provision for 15 sample and is supplied with 15 nos. Glass reaction vessels and 15 nos. Air condensers. Fitted with a digital ON/OFF timer,the samples after being digested for 2 hours can be analyzed using calorimeter or conventional titration method. To work on 220/230 van A.C.