Encardio-Rite’s Model EDS-12V 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 gage 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.

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Instrument Name

Sister bar strain meter

Sensor Type

Vibrating wire


Consists of a instrumented hollow rebar, extended on the two sides with solid reinforced bars.


To measure strain/stress in reinforced concrete structures, scuh as piles, d-walls, bridge abutments, etc.




2500 μ strain

Key Testing / Calibration

accuracy test

Key Feature/Advantage

Fully encapsulated for protection against handling and installation damage.

Protection (Waterproofing)

IP-68, water resistant up to 40 mwc

Dimension (mm)

26 x1400 (for 12.0 φ) 30 x1400 (for 16.0 φ)

Other Strain Gauge Products


Arc Weldable Strain Gauge


Spot Weldable Strain Gauge


Low-range Embedment Strain Gauge


Heavy-duty Strain Gauge

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