Injection molding and die casting demand precise, repeatable position feedback under extreme pressure, heat, shock, and vibration. A magnetostrictive displacement sensor is ideal for these harsh processes. It uses a waveguide, movable position magnet, and short current pulse. The magnet's field and current pulse create a torsional strain wave. The sensor measures the wave's time of flight to calculate absolute position without contact wear. For injection molding, the sensor monitors screw position, injection stroke, mold closing, clamping, and ejection. Accurate screw position controls shot size, injection speed, hold pressure, and cushion. This reduces scrap, flash, short shots, and cycle variation. In die casting, it tracks plunger and shot cylinder movement. Fast feedback supports shot profile, gate velocity, intensification, and mold protection. It also helps dosing and ladle positioning. Magnetostrictive sensors offer high resolution, long stroke lengths, absolute output, and excellent repeatability. They resist hydraulic fluid, metal splash, heat, EMI, and shock. Common outputs include 4-20 mA, 0-10 V, SSI, CANopen, and EtherCAT. Rod, rodless, and profile designs fit various machines. For best results, align the magnet, avoid side loading, use shielded cables, and ground properly. With correct selection and installation, these sensors improve process stability, product quality, and machine uptime in injection molding and die casting.