Liquids and gases exhibit different physical properties, which influence how pressure control systems must be engineered. Liquids are generally incompressible and maintain a consistent volume under pressure, which allows for more direct and stable control. Gases, on the other hand, are compressible and tend to expand or contract significantly with even small pressure changes. This fundamental contrast requires tailored approaches by any Pressure Control Factory(https://www.monroswitch.com/product/automatic-pump-control/) designing systems for each medium. Understanding these inherent properties is the one step toward creating effective, safe, and precise control systems suited for their respective applications.