In the operation of pneumatic systems, it is crucial to understand the pressure status in the circuit in real time. As the core on-site monitoring component, the pressure gauge continuously provides intuitive pressure readings to the operator. Its reliable indication is not only related to the real-time evaluation of system performance, but also the basic basis for ensuring the safe operation of equipment and preventing potential overload risks. Selecting the type of pressure gauge that is suitable for specific working conditions and application requirements, and ensuring its functional matching and accurate indication, is an indispensable part of building a stable and efficient pneumatic circuit.