Small laboratory composite autoclave for sale is generally used in conjunction with large hot press tanks. Several large composite autoclaves are used to produce composite materials, and several small hot press tanks are used for process experiments, material formula testing, new product development, and training and learning. The experimental composite autoclave provides a relatively large testing range for experimental personnel according to customer process requirements. The design pressure and temperature are relatively high, and the control method generally adopts a highly automated control method. It is required that the temperature, pressure, and working time inside the tank can be displayed in real time, and historical parameter curves can be recorded, and reports can be exported.