Tunnel oven is easy to operate and easy to master The tunnel oven product further guarantees the quality requirements of heat treatment, and the controller is to comply with the needs of the heat treatment process from time to time. Improve the product rejection rate, save energy and electricity, and also in order to improve the control accuracy during the heating, heat preservation, cooling process and the precise control of the carbon potential and the nitrogen potential, increase the human characteristic error, and meet the parameter requirements of the complex heat treatment process.