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 38mm. dia reaction vessels with 20ml sample size to heat at temp. Of 1 50°C 1°C± controlled by Microprocessor based state digital temp. Indicator-cum-controller. It has provision for 1 5 samples and is supplied with 15 nos. glass reaction vessels and 1 5 nos. air condensers. Fitted with a 2 hours timer, the samples after being digested for 2 hours can be analyzed using calorimeter or conventional titration method. To work on 220/230 Volts. AC.