The electric radiant tube operates based on the principle of resistance heating. When current passes through the heating element, electrical energy is converted into thermal energy due to the resistance of the heating element. The heat generated by the heating element is radiated outward through the protective tube, heating the surrounding medium or workpiece. Since both the heating element and the protective tube are made of high-temperature resistant materials, the electric radiant tube can work normally in high-temperature environments without being damaged.
