Constant temperature heating plate, stable temperature: 50~260C. 1) Aluminum shell. PTC heater is ... with ceramic paint, aluminum plate oxygenated, aluminum plate coated with teflon, aluminum plate electroplated, ceramic plate polished, ceramic plate glaze coated. Many color can ... read 3w. tiancheng-ptc.com. 1) After switching on, the heating power is large, and then decrease, finally it become steady ...