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 helves to convenient height. The door is fitted with glass viewing window to facilitate inspection of sample without disturbing the test temperature.
Temperature is controlled by "EGO" / "JUMO" GERMAN hydraulic type capillary thermostat from ambient to 70°C ± 0.5°C. An L shaped prismatic thermometer is fitted to unit for reading the chamber temperature. Air ventilators are also provided on the sides of unit. To work on 220/230 volts A.C. supply.