Tender For supply of cod digestion apparatus : make : shweta or similar. to determination of chemical oxygen d emand. it is a solid state block heated unit with provision for samples to be digested at a time in 40 mm. di a reaction vessels with 20ml. sample size to heat at temp. of 150 degree celsius +/- 1 degree celsius contr olled by microprocessor based pid digital temperature indicator cum-controller. it has provision for 15 sam ples and is supplied with 15 nos. glass reaction. vessels 200 mm. tube fitted with a 2 hour timer, the samp les after being digested for 2 hours can be analysed using calorimeter or conventional titration method. to work on 220/230 volts ac [ warranty period: 12 months after the date of delivery ]