Linear displacement sensors are essential for precise motion control in stacker-reclaimers. Mounted on boom luffing, travel, slew, and bucket-wheel mechanisms, they provide continuous position feedback to the PLC. This feedback helps operators avoid over-travel, reduce mechanical stress, and improve stockpile accuracy during automatic stacking and reclaiming. In dusty, vibrating, and outdoor coal or ore yards, a robust sensor must resist shock, moisture, temperature swings, and electromagnetic interference. Reliable linear displacement sensors support anti-collision protection, safe interlocks, and predictive maintenance. When selecting a model, match the stroke length, mounting style, IP rating, output signal, and response speed to the machine's duty cycle. Analog outputs such as 4-20 mA or 0-10 V suit many PLC systems, while digital and fieldbus options simplify diagnostics. Correct installation with shielded cabling, stable power, and regular inspection extends service life and reduces downtime. By integrating accurate linear position measurement, stacker-reclaimers achieve smoother operation, higher availability, and lower maintenance costs. For harsh yards, stainless steel housings, pressure-resistant seals, and flexible mounting brackets improve durability. A well-matched sensor also reduces spare-part costs and supports faster fault tracing. Routine zero and span checks keep measurement stable, while remote diagnostics help maintenance teams plan service before failures stop production.