Arc Weldable Strain Gauge

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Model EDS-20V-AW Overview

The Encardio-rite model EDS-20V-AW strain gauges are intended primarily for long-term strain measurement and are suitable for surface mounting by welding on steel structures such as bridges, piles, wye sections, pressure shafts, tunnel linings, and supports, etc. The tube is flattened in the middle to accommodate a sensor (coil/magnet assembly) in the construction. To mount the strain gauges, two annular mounting blocks are accurately positioned and aligned by a dummy gauge and welded to the structure. The strain gauges incorporate the latest vibrating wire technology to provide a digital readout on a remote vibrating wire indicator.

The model EDS-20V-AW provides further protection by suitably sealing the joints with heat shrinkable tubes. In addition to this, a special waterproofing compound seals the plucking coil in the sensor assembly from any ingress of water.

Specifications

Range 3000 µ strain
Sensitivity 1 µ strain
Active gauge length 150 mm
Thermistor YSI 44005 or equivalent
Temperature limit -20° to 80°C
Size l x b x h (mm) 174 x 28.5 x 30
Cable connection Four-core shielded 1 m long; specify

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Instrument Name

Arc weldable strain gage

Sensor Type

Vibrating wire

Construction

Available with welding as well groutable mounting blocks, suitable for surface mounting; can also be embeded

Application

To measure strain/stress on steel structure or on concrete surface - dam, pile, D-wall, strut, tunnel lining, bridge, etc

Parameter

Strain/stress

Range (kN)

3000 μ strain

Key Testing / Calibration

Accuracy test, thermally aged to minimize long-term drift

Key Feature/Advantage

Great resistance to corrosive, humid, wet and other hostile conditions

Protection (Waterproofing)

IP-68, water resistant up to 40 mwc

Dimension (mm)

174 x 28.5 x 30

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4

Sister Bar Strain Gauge

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