Construction machinery relies on accurate cylinder position feedback for boom, arm, bucket, outrigger, and steering control. A built-in LVDT displacement sensor is installed inside the hydraulic cylinder, where it measures rod extension without external mechanical linkage. The sensor converts core movement into a proportional analog signal for the ECU or controller.

Typical model: HLC-LVDT-50. Standard stroke: 50 mm; optional strokes: 25, 100, 150, 200, and 250 mm. Excitation: 5 Vrms, 2.5 to 5 kHz, or DC 24 V with integrated electronics. Output: 0-5 V, 0-10 V, 4-20 mA, or RS485. Linearity: +/-0.25% FS; repeatability: <=0.01 mm. Operating pressure: up to 35 MPa; burst pressure: 70 MPa. Protection: IP67/IP69K. Operating temperature: -40 deg C to +85 deg C. Housing: stainless steel 304/316L; core: high-permeability alloy. Cable: PUR or PTFE, with pressure-resistant connector.

Installation requires a concentric bore, proper core clearance, and a stable reference point. The sensor must be protected from excessive radial load and hydraulic contamination. Regular zero-point checks and connector inspection improve reliability. With rugged design and precise output, built-in LVDT sensors support safer, more efficient construction machinery control. For demanding applications, specify reinforced cable, EMI shielding, and a pressure-proof connector. Calibration at mid-stroke and full-stroke confirms linearity, zero stability, and repeatable position feedback. The result is long service life in harsh duty cycles.