These are sturdy double walled units with outer chamber made of M.S. sheet duly enamel painted with inner made up of anodised aluminium or S.S. sheet. The gap between inner and outer chamber is filled with high grade glass wool to avoid thermal losses. Beaded heating elements are placed in ribs, at bottom and sides. Inner chamber is provided with ribs for adjusting perforated shelves to convenient height. Temperature is controlled by "EGO"/"JUMO"GERMAN hydraulic type capillary thermostat from 500C to 2500C ± 10C .
An-L shaped prismatic thermometer is fitted to the unit forreading the chamber temperature. Air ventilators are also provided on the sides of the unit. To work on 220/230volts A.C.