Rebar Strain Gauges

Kingmach rebar strain gauges are built around a steel carrier that matches the thermal expansion of typical reinforcing steel. This design choice reduces temperature-induced errors that can muddy long-term data. The sensing element uses foil strain gauge technology, which gives stable readings over a wide range of temperatures. A built-in thermistor provides temperature compensation, so you can separate mechanical strain from thermal effects. The gauge body is sealed against moisture, and with proper cable termination it can handle submersion or high humidity. Standard models have an IP68 rating, but cable exits and connectors are often the weak point in wet environments. That’s why we offer armored cables and custom sealing options for projects that expect harsh conditions. Measuring range is typically up to 3,000 microstrain, which covers the yield strain of most reinforcing bars. Higher ranges are available on request. Output follows the standard full-bridge configuration, making these gauges compatible with most readout boxes and data loggers. Because Kingmach is a professional manufacturer of geotechnical instruments, you’re not locked into off-the-shelf specs. We frequently adjust gauge length to fit anchor spans, cable lengths to route through formwork, and steel grades to match the rebar chemistry on site. After the pour, if you need extra technical support or spare sensors, our distribution network can get parts to your project without long delays. For archiving or analysis, data can be exported to CSV or integrated into third-party monitoring platforms. The idea is to give you a strain reading tool that doesn’t demand changes to your construction sequence, while still holding up over the design life of the structure.