Automatic time electro-thermal boiling sterilizer structural character: 1,the cover of the sterilizer, the body of the unit and the instrument try are made of brass coated with nicked chromic. the outer casing is made of a fine quality steel plate coated with baking finish. the glass wool, a heat-insulating material is filled between the inner jacket and the outer casing so as to made full use of heat. 2,the heating element is an electro-chemical tube(220V,1500W) which is fixed on the bottom inside the main body. when the tube is electrified ,it heats the water directly and can fully utilize thermal energy. 3,this sterilizer can preset the time of sterilization, and automatically control the temperature of sterilization. when timing end, it can automatically cut off the power source. overall dimension:444mm*207mm*235mm. instrument tray dimensions:414mm*174mm*30mm. power source:7A/ac 220V. timer:0-30 min. weight of whole unit:9 kg.