1) Use of internal heating ensures the heating tube working without air oxidation, thus to lengthen the service life of heating element 2) PID intelligent control and precious metal sensor to timely show the temperature in the furnace, thus to actuate precise temperature control 3) Use of high quality stainless steel tin pot to feature high temperature resistance, quick temperature rise, long service life, economy of electric power and easy operation Technical parameters: 1) Type: ZB-38D, ZB-50D, ZB-80D, ZB-100D 2) Range of temperature control: normal temperature 200-450 3) Dimensions of tin trough: 38mm, 50mm, 80mm, 100mm 4) Weight of tin: 38mm 0. 3kg, 50mm 0. 5kg, 80mm 1. 6kg, 100mm 2. 3kg 5) Power: 150W, 200W, 250W, 380W 6) Power supply: AC 220V 10% 50Hz 7)time for Melt down tin: 3-8 Minute Tin pot Diameter (mm ): 38mm, 50mm, 80mm, 100mm.