Nitrogen filled oven is a new type of electric drying oven, which is mainly used to purify the oven for universities, scientific research departments and other relevant units. The nitrogen filling oven adopts stainless steel inner liner and stainless steel tube for heating, which can be filled with purified nitrogen. Therefore, a clean and even temperature drying environment is created in the oven, which helps to improve the quality of the test sample. The nitrogen filling oven has beautiful appearance, good sealing performance of the furnace door, convenient use and high temperature control precision.