The Vibrating Wire Rebar and Sister Bar Strain Gauges measure strain in concrete and consist of a coil assembly and a Vibrating Wire element with rebar extensions at each end. Rebar Strain Gauges are welded into the reinforcing cage and must be matched to the size and grade of the rebar forming the cage. Sister Bars are installed alongside existing lengths of rebar within the cage. Both types of strain gauge are extremely robust, reliable and waterproof. The gauges can be read individually or remotely/ automatically as part of a data collection system. A factory fitted, four-core screened cable connects the coil to the readout unit. The Rebar Strain Gauge operates on the established Vibrating Wire principle.

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