The Concrete Surface Mounted Strain Gauge operates on the established Vibrating Wire principle, whereby a wire held under tension is read by an excitation/reading coil. Any change in the strain (tension) on the wire causes the resonant frequency of the wire to alter and is directly proportional to strain changes in the member being monitored.

The Concrete Surface Mounted gauge consists of two end bolts and a sealed tube containing the wire, which is attached via allen bolts to two removable anchors, one at either end, which in turn are site grouted using the setting bar as a template into holes drilled into the structure to be monitored. The gauge can be removed during anchor grouting to prevent damaging it.

The sensor can be read with any commercially available Vibrating Wire readout and the incorporated thermistor allows for temperature data to be recorded. As with all Vibrating Wire instruments, the use of a frequency based signal allows for long cable runs (in excess of 1000m) between the instrument and the readout point or datalogger.

Robust, reliable and easy to use
Can be used with long cable lengths with no degradation of signal
Strain gauge can be adjusted to allow for the most effective use of the range
Intergral thermistor
Gauge and coils are re-useable
Suitable for remote reading and data-logging

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