In pneumatic automation systems, in order to achieve effective perception and feedback of the cylinder piston position, a non-contact sensing element——magnetic switch, is often used. The core of this element relies on changes in the magnetic field for state detection. When the specific magnetic body built into the cylinder piston reaches its sensitive area with movement, the sensing mechanism inside the element is stimulated, which immediately triggers a clear change in its output state, forming the conduction or cutoff of the electrical signal.
The electrical signal generated by this change clearly identifies the key endpoints or preset position information of the cylinder piston stroke. This signal is seamlessly connected to the subsequent control logic loop as the core state feedback. The system can accurately grasp the real-time position status of the actuator, providing a basic and reliable basis for the realization of automated closed-loop functions such as action sequence control, in-place detection, safety interlocking or process counting. Its working mode without mechanical contact enables it to show unique applicability and stability value in typical industrial compressed air drive environments such as frequent movements, oil pollution or vibration.