Vibrating Wire Strain Gauge Brochure
RST Vibrating Wire Strain Gauges are designed to be welded to or embedded in various structures for monitoring strain.
RST Vibrating Wire Strain Gauges are designed to be welded to or embedded in various structures for monitoring strain. RST vibrating wire strain gauges are available in 3 models: VWSG-A, for arc welding to steel structures; VWSG-S, for spot welding to steel structures and VWSG-E for embedment in concrete.
Each strain gauge consists of two end blocks (designed specifically for each application) with a tensioned steel wire between them. As the steel or concrete surface that encompasses the strain gauge undergoes strain, the end blocks will move relative to each other. The tension in the wire between the blocks will change accordingly, thus altering the resonant frequency of the wire. A vibrating wire readout is utilized to generate voltage pulses in the magnet/coil assembly located at the center of the strain gauge. The magnet/coil assembly plucks the wire and measures the resulting resonant frequency of vibration.
The advantages of vibrating wire strain gauges are that the frequency output is immune to electrical noise, able to tolerate wet wiring common to geotechnical applications, and capable of signal transmission of several kilometers without loss of signal.
RSTAR Affinity Data Loggers, DT Series Data Loggers, or the RST VW2106 Vibrating Wire Readout, (see separate brochures) can be used to read vibrating wire strain gauges.
|VWSG-S-3000 OR VWSG-S-5000
|Standard Gauge Length
|165 mm (6.5 in.)
|156 mm (6.125 in.)
|50.8 mm (2 in.)
|3000 µε / 5000 µε
|0.5 to 1 microstrain
|-4 to 176°F
(-20°C to 80°C)
|Thermal Coefficient of Expansion
|+/- 0.5% F.S. (batch calibration)
+/- 0.1% F.S. (individual calibration – upon request) contact RST for complete details.
|EL370004 or EL380004
|Please contact RST using the form below for complete information about accessories.
VWSG-A-INST (installation tools)
The Vibrating Wire Strain Gauge is commonly used for measuring strain in steel members and concrete structures including bridges, piles, dams, tunnels, and buildings.
View illustrations on how the Vibrating Wire Strain Gauge is used for:
|Custom cable lengths available upon request
|Vibrating Wire Arc Weldable Strain Gauges
|Vibrating Wire Strain Gauge Arc Weldable w/5m of EL370004 Cable and End Blocks
|Vibrating Wire Strain Gauge Arc Weldable w/15m of EL370004 Cable and End Blocks
|Vibrating Wire Strain Gauge Arc Weldable w/30m of EL370004 Cable and End Blocks
|Vibrating Wire Strain Gauge Arc Weldable w/50m of EL37004 Cable and End Blocks
|Vibrating Wire Embedment Strain Gauges
|Vibrating Wire Embedment Strain Gauge w/5m of EL370004 Cable
|Vibrating Wire Embedment Strain Gauge w/15m of EL370004 Cable
|Vibrating Wire Embedment Strain Gauge w/30m of EL370004 Cable
|Vibrating Wire Embedment Strain Gauge w/50m of EL370004 Cable
Vibrating Wire Strain Gauge Brochure
Vibrating Wire Arcweldable Strain Gauge (VWSG-A) Manual
Vibrating Wire Strain Gauge Model VWSG-S Instruction Manual
Vibrating Wire Embedment Strain Gauge (VWSG-E) Manual
I’m very happy with the quality of the instrumentation and technical support from RST, as always. They worked with us from the initial stages of the project to ensure that we were fully prepared and equipped to use the RSTAR network for the first time. They delivered everything within the tight project time frame to ensure that there were no delays on site, and the submersible tilt meters looked like new even after over twelve months of being submerged in Thames water!
-Richard Lipscombe, BEng (Hons), Director & Principle Consultant - RL Geotechnical Ltd