Production process automation refers to the automatic control of production processes characterized by continuous logistics, mainly addressing the automatic monitoring and control of parameters such as temperature, pressure, flow, liquid level (or material level), and composition (or physical properties) in various production processes. Through the analysis of each link and the overall operation of the system, the process control design centered on the product processing technology flow and the selection and calculation of instruments and meters based on the system performance parameters ensure the stable and sustainable operation of the system.