Smart vibrating wire strain gauge (surface model)

The smart vibrating wire strain gauge (surface model) from Kingmach is built for direct attachment to concrete, steel, or other structural materials. It operates on the proven vibrating wire principle: a tensioned steel wire inside the gauge changes frequency as the gauge body deforms with the structure. This frequency output is inherently resistant to electrical noise and cable-length effects, which is why many long-term monitoring projects prefer VW sensors over electrical resistance types. Each gauge comes with a built-in NTC thermistor, allowing you to monitor temperature variations and compensate strain readings accordingly. The surface mounting design uses anchor lugs or spot-welded brackets—no need to embed the sensor inside fresh concrete. That makes it practical for existing structures, or in situations where embedding isn’t possible. Kingmach produces these gauges in-house, with quality checks at every stage. We offer standard ranges (typically up to 3000 microstrain) but can adjust the range and sensitivity for specific jobs. The sensor body is stainless steel, sealed against moisture, and suitable for direct burial or submersion with proper cable termination. We also supply compatible dataloggers, multiplexers, and the software to manage readings—so you get a complete system, not just a sensor. Our customers often ask about long-term drift. Like any high-quality VW gauge, if installed correctly and protected from physical damage, drift rates are low—often a few microstrain per year. The key is proper initial tensioning and a well-sealed cable splice. Technical support is part of the package. Our engineers can help with installation planning, recommend the right adhesive or grout, and assist with data interpretation if needed. And because we maintain distribution partners in several regions, support and spare parts are usually available locally. In short, when your project demands reliable surface strain monitoring, Kingmach delivers a sensor that’s straightforward to install, compatible with standard readout units, and backed by people who understand geotechnical instrumentation.