magnetostrictive displacement transducer

Kingmach’s magnetostrictive displacement transducers use the magnetostriction principle—a current pulse interacts with a magnetic float, producing a torsional strain wave that travels along a waveguide. The time‑of‑flight is converted into a displacement reading with high linearity and repeatability. Because the sensing element has no electrical contacts moving along a resistive track, there’s virtually no mechanical wear. Typical non‑linearity figures stay within industry norms for structural monitoring (often 0.02% to 0.05% of full scale, depending on stroke and output type), and the signal remains stable over millions of cycles. IP67 or IP68 sealing is common, allowing installation in submerged or high‑humidity environments. Output versions include analog (4‑20 mA, 0‑10 V) and digital (SSI, Modbus), making integration straightforward with PLCs and remote terminal units. Stroke lengths can be specified from a few centimeters to several meters, and Kingmach frequently supplies non‑standard ranges and mechanical mountings to match existing borehole or bracket setups. Since the electronics can be housed separately from the rod, long cable runs up to a few hundred meters are feasible without signal degradation—a practical advantage for dam abutment and slope monitoring. Field support covers installation guidance, troubleshooting, and spare float kits. If you’re not sure which configuration fits the monitoring plan, the engineering team typically reviews sensor placement drawings and recommends the right housing, sealing, and output protocol.