Smart Formwork Displacement / Steel Wire Displacement Meter

The steel wire displacement meter from Kingmach converts mechanical displacement of a formwork surface into an electrical signal via a spring-loaded wire and potentiometric or LVDT sensor. Standard models cover ranges from 25 mm to 500 mm, with higher ranges available for large-span structures. The wire is stainless steel, resisting corrosion in wet grout environments, and the sensor housing is IP65-rated for tunnel conditions. Temperature compensation is built in, reducing drift from ambient changes. Output options include 0-5V, 4-20 mA, or modbus RS485, simplifying integration with data loggers or wireless nodes. For a typical tunnel lining application, technicians fix the meter to a stable reference, attach the wire end to the formwork, and pre-tension the spring. As concrete is pumped and pressure builds, the monitor tracks displacement in real time. Alerts can be set for preset thresholds. Kingmach provides pre-sale technical support to help select the right range and mounting accessories. The company also offers calibration certificates and after-sales service through its global network. Compared to vibrating wire sensors, the steel wire type often responds faster and does not require a special readout, making it a practical choice for dynamic formwork monitoring. The modular design allows replacement of the transducer without removing the entire assembly. Custom cable lengths up to 200 m can be supplied, with shielded cables to reduce electrical noise. This meter is also used for monitoring joint openings in retaining walls, slope creep, and structural cracks.