draw wire displacement sensor

A draw wire displacement sensor operates by extending a high-tensile stainless steel wire wound onto a precision drum. As the wire moves, a rotary encoder or potentiometer translates the rotation into an analog voltage, current, or digital pulse. Kingmach builds these sensors with field conditions in mind: the housing is sealed against moisture and dust, and the wire exit is guided to reduce wear even with angled pulls. You can choose from standard measurement ranges up to tens of meters, with linearity typically within 0.1% of full scale, depending on the sensing element. We offer potentiometric, 4-20 mA, 0-10 V, and incremental encoder outputs to match common monitoring systems. The wire itself resists breakage under repeated cyclic loading, and the internal spring mechanism maintains constant tension so readings stay repeatable after thousands of cycles. For geotechnical applications such as landslide monitoring, crack monitoring on dams, or convergence measurements in tunnels, the sensor often mounts between fixed and moving reference points—no parallel guides needed. Structural engineers use it during load tests on bridges and beams, while industrial users apply it for stroke measurement on presses or hydraulic cylinders. Because we manufacture in-house, we can supply non-standard cable lengths, different mounting brackets, or even waterproof connectors when your site requires it. Our team handles export logistics and provides wiring diagrams and calibration sheets with each shipment, so local integration moves faster.