Sister Bar Strain Gauge

The Vibrating Wire Sister Bar is used to measure strain in concrete structures such as diaphragm/slurry walls, piles, tunnel lining, bridge abutments, foundations, dams etc. It contains of a hollow bar with vibrating wire strain gauge which is coaxially mounted inside it. On the two end sides the hollow bar is extended with 12 mm Ø reinforced bars.


This model is also available with a 16 mm Ø reinforced bar variant.

Range 2500 µ strain
Sensitivity 1 µ strain
Maximum Ø  x l (mm) 26 x 1400 (for 12 mm Ø  nominal-standard)
30 x 1400 (for 16 mm Ø  nominal-standard)
Thermistor YSI 44005 or equivalent
Temperature limit
Protection IP 68
Cable connection Four-core shielded 1 m long; specify
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Equipment Rental

GDS has a variety of instruments for hire, these Instruments, Readouts and Dataloggers are available for product hire on a short-term (fortnightly) or long-term (monthly) basis including, but not limited to, the following:

  • Load cells
  • Tilt meters
  • Manual Readout units
  • Dataloggers
  • Tiltmeters
  • Inclinometers