Pressure switches are fundamental and core monitoring and protection components in industrial automation pressure control systems, widely used in numerous industries such as chemical, mining, water conservancy, HVAC, and machinery manufacturing. Compared to precision electronic devices such as pressure sensors and transmitters, pressure switches are simpler in structure, more practical, and adaptable to a wider range of scenarios. They can monitor pipeline and equipment pressure changes in real time, enabling automatic start/stop, pressure protection, fault alarms, and safety interlocks. With their stable and reliable performance, low operating costs, and strong environmental adaptability, pressure switches have become the preferred equipment for industrial pressure control. Their core advantages are mainly reflected in high reliability, rapid response, strong adaptability, simple operation and maintenance, good safety, and outstanding cost-effectiveness.