Installing a built-in linear displacement sensor in a hydraulic cylinder requires careful preparation to protect accuracy and sealing. First, verify cylinder dimensions, sensor stroke, and mounting interface. The cylinder end cap and piston must be machined to the sensor manufacturer’s drawing, with clean bores, correct concentricity, and smooth chamfers. Before assembly, remove burrs and contamination; even small metal particles can damage the waveguide or sensing element. Mount the position magnet securely on the piston at the specified location, using the recommended screws and thread locker. Keep the magnet concentric with the sensor rod and avoid magnetic interference from nearby steel parts. Insert the sensor into the end cap or cylinder body slowly and squarely. Never force or bend the probe; slight misalignment can cause rubbing and premature failure. Apply the specified O-rings and seals, lubricate them with compatible hydraulic fluid, and tighten fasteners to the required torque in a cross pattern. Route the cable away from sharp edges, heat, and moving parts, and provide strain relief. Check electrical connections according to the wiring diagram, then fill and bleed the cylinder. Move the piston slowly through the full stroke and verify output linearity, zero point, and span. If adjustment is needed, follow the calibration procedure before final locking. A clean assembly area, correct tools, and strict tolerance control ensure reliable sensor performance and long service life.