A magnetostrictive displacement sensor is a high-precision position feedback device used in hydraulic cylinders. It measures piston movement using a magnetostrictive waveguide and a permanent magnet mounted on the piston. A current pulse creates a torsional strain wave when it interacts with the magnet. The sensor measures the pulse return time and converts it into an accurate position value. This non-contact principle eliminates wear, making it ideal for demanding hydraulic systems.

In hydraulic cylinders, these sensors provide continuous absolute position feedback. Unlike incremental encoders, they do not need re-zeroing after power loss. They support long strokes and offer high repeatability. Common outputs include 0-10 V, 4-20 mA, SSI, CANopen, and EtherCAT for easy PLC integration.

They improve cylinder control in mobile machinery, injection molding, steel mills, and industrial automation. They enable precise speed, force, and position regulation, reduce downtime, and increase safety. Installation often uses a drilled piston rod or protected sensor rod inside the cylinder. Proper alignment, sealing, and shielding ensure reliability.

When selecting a sensor, consider stroke length, pressure rating, output signal, temperature range, and IP protection. Quality units withstand shock, vibration, and contamination while maintaining stable performance. For hydraulic cylinders that demand accuracy and durability, magnetostrictive technology is a trusted solution.