Strain Gauge

Brand : Slope Indicator – USA

Applications
Spot-weldable vibrating wire strain gauges are used with strain gauge sensors to measure strain in steel.
Typical applications include:

• Monitoring structural members of buildings and bridges during and after construction.
• Monitoring changes in load on ground anchors and other posttensioned support systems.
• Measuring strain in tunnel linings and supports.
• Monitoring areas of concentrated stress in pipelines.
• Monitoring distribution of load in pile tests.

Operation
The strain gauge operates on the principle that a tensioned wire, when plucked, vibrates at a frequency that is proportional to the strain in the wire.
The gauge is constructed so that a wire is held in tension inside a small diameter, thin-walled tube that welded to the structural member.
Loading of the structural member changes the length of the tube and results in a change in the tension of the wire.

An electromagnet in the strain gauge sensor is used to pluck the wire and return a frequency signal. Strain is then calculated by applying calibration factors to the frequency measurement.

Advantages
Preset Gauges: The spot-weldable is available in three tension ranges to match virtually any application. This eliminates the time-consuming process of tensioning the vibrating wire element in the field.
Full-Length Welding Flange: The full length welding flange allows reliable coupling of the gauge to the structural member and prevents misalignment of the end points of the gauge, a common problem with other
strain gauges.
Very Low Profile: The vibrating wire element is positioned only 0.96 mm (0.038″) above the measured member.
This patented, low-profile design reduces errors caused by bending of the structural member.
Stainless Steel Construction: The outer components of the strain gauge are constructed from stainless steel
for corrosion resistance. The wire itself is steel, selected to match the thermal characteristics of structural
steel.

Ordering Info And Technical Specification :

SPOT-WELDABLE STRAIN GAUGE
Gauge Set Midrange . . . . . . . . . . .52602100
Gauge for Compressive Strain . . .52602101
Gauge for Tensile Strain . . . . . . . .52602102
Vibrating wire strain gauge for spot welding to steel. Requires strain gauge sensor below.
Range: Approximately 2,500 microstrain.
Gauge Length: 62 mm (2.45″).
Height of Wire: 0.96 mm (0.038″) above measured member.
Thermal Coefficient: 10.8 x 10-6 per °C, 6 x 10-6 per °F.
Materials: Stainless steel flange and tube, steel wire.
Dimensions: 66.7 x 7.6 x 1.8 mm, (2.65 x 0.3 x.07 inch).

VW STRAIN GAUGE SENSOR
Strain Gauge Sensor . . . . . . . . . . .52623000
VW strain gauge sensor is a pluck-type vibrating wire sensor for spot-weldable strain gauge. Includes a thermistor or RTD for temperature measurements and two stainless steel welddown straps for fixing sensor to structure. Does
not include signal cable.
Frequency Range: 0.8 to 2.4 kHz.
Temp Rating: -29 to 105 °C, -20 to 220 °F.
Waterproof Rating: 10.4 bar, 150psi.
Materials: Resin-filled ABS plastic case.
Dimensions: 80 x 26 x 16 mm, 1 x 3.17 x 0.64″.
Weight: 28 g (1 oz).

SIGNAL CABLE
Signal Cable . . . . . . . . . . . . . . . . . 50613524
Shielded cable with four 22-gauge tinned-copper conductors and polyurethane jacket that is rated for 80 °C (176 °F). Attached to sensor at the factory.
Universal Connector. . . . . . . . . . . 57705001
Universal Terminal Box. . . . . . . . . 57711600
Provides connections for 12 sensors and an indicator.
Sensors selected by rotary switch. Weatherproof fiberglass box measures 290 mm wide x
345 mm high x 135 mm deep (11. 5 x 13.5 x 5.25″).

INSTALLATION ACCESSORIES
Scotchkote . . . . . . . . . . . . . . . . . . 06700019
For applying moisture barrier. 440 ml (15oz) can.
Spare Weld-Down Straps . . . . . . . 52623110
Two weldable stainless steel straps designed to hold sensor onto structure.
Protective Cover . . . . . . . . . . . . . 52623120
Formed stainless steel cover for sensor.
3M Mastic Pad . . . . . . . . . . . . . . . 06700180
Self-vulcanizing sealing material.
Spot Welder, 115VAC . . . . . . . . . . 52602550
Includes tip, hand piece, welding unit, battery, and case.
Spot Welder, 220VAC . . . . . . . . . . 52602560
Includes tip, hand piece, welding unit, battery, and case.

Informasi Produk :

Yudhistira

Hp. 0811 188 6845

Email : naysite2@gmail.com;