Air electric heaters are widely used heaters. We all call them air electric heaters. In fact, they can be divided into many types according to the impediment of heating gas. Commonly, there are nitrogen heaters and hydrogen heaters. . These can all be called pipeline gas heaters. Air electric heaters are primarily used to heat the required air flow from the initial temperature to the desired air temperature up to 850 °C. It has been widely used in many research and production laboratories such as aerospace, weapons industry, chemical industry and higher education institutions. It is especially suitable for automatic temperature control and high flow high temperature combined system and accessory test. Air electric heaters are used in a wide range: they can heat any gas, and the hot air produced is dry, non-conductive, non-conductive, non-flammable, non-explosive, non-chemically corrosive, non-polluting, safe and reliable, and heated up quickly. Controllable).