During the commissioning of a high‑speed packaging line, the pressure gauge selector switch lets the control engineer quickly switch between pressure readings of the pneumatic drive and the hydraulic clamping system. Mounted on the front panel of the PLC‑controlled control cabinet, the switch is wired to multiple pressure transducers, allowing a single operator to view the selected pressure on the local display or to route the signal to a supervisory system. When a process step requires a different pressure range—such as accelerating the conveyor or engaging the sealing head—the selector provides immediate access to the relevant gauge without re‑configuring wiring or stopping the line. This capability shortens change‑over time, reduces the risk of human error, and supports the safety interlock logic that halts motion if any selected pressure exceeds its set point. In motor‑vehicle assembly cells, the same switch is used to monitor pneumatic torque tools and to select the appropriate pressure reference for robot‑gripper calibration, ensuring consistent clamp force across the production line. The part therefore acts as a versatile interface that bridges sensor data with operator decision points in automated equipment.