Features: 1.Double layer steel casting with air cooling fans to keep case temperature lower; 2.High purity fiber alumina board chamber for the best energy saving; 3.The temperature is controlled by precision scr(silicon controlled rectifier) with accuracy +/-1 c and 30 segments programmable control; 4.The fast rate of temperature increasing and decreasing. 5.The furnace chamber is ceramic fiber brick with excellent thermal insulation, vacuum reservoir with water cooling system 6.The furnace is equipped with the function of power off automatically when door furnace opening, function of over temperature alarm, etc. Descriptions: Chamber dimension 150x150x150mm Max. Temperature 1600c Working temp.