Overhead crane high-pressure linear displacement sensors provide reliable position feedback for trolley travel, hoist height, spreader alignment, and hydraulic control. Before selection, verify the following technical parameters. Typical measuring ranges are 50–2000 mm; repeatability should be ≤0.05% FS, resolution ≤0.01 mm, and linearity ≤±0.1% FS. Output options include 4–20 mA, 0–10 V, RS485, CANopen, and SSI to match crane PLC and drive systems. Supply voltage is commonly 24 VDC ±10%, with current consumption below 100 mA and overload protection. High-pressure models must withstand 25–60 MPa peak pressure, depending on hydraulic housing and seal design. The protection class should be IP67 or IP69K for dusty, wet, and washdown environments. Operating temperature is usually -40°C to +85°C; vibration resistance should cover 10–2000 Hz, and shock resistance should reach 50 g. Stainless-steel or anodized aluminum housings resist corrosion, oil, and impact. EMC compliance, reverse-polarity protection, and short-circuit protection improve safety. Installation requires stable mounting, correct stroke alignment, and shielded cable routing away from variable-frequency drives. For safety-critical applications, dual-channel redundancy and diagnostic output are recommended. The mechanical stroke should exceed the working stroke by at least 10% to avoid overtravel, and the sensor body should be rated for the crane's duty cycle and side-load conditions. Regular calibration, cable inspection, and seal checks maintain accuracy under heavy-duty crane cycling. Choose a sensor with certified parameters and a compatible signal interface for reliable long-term performance.