For incubating BOD samples of effluent and others. Double walled, heavily insulated. Temperature ranges 5OC. 50O C. Accuracy ± 0.5 OC Automatic control. Double door construction Inner chamber size 33"x20"x16.5". Inner chamber size 34.5"x22.5x"22.5" Inner chamber size 36"x26"x23 Option : Digital Temperature Indicator cum controller