Vibrating Wire Soil Extensometer

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The RST Vibrating Wire Soil Extensometer is developed to monitor lateral and longitudinal deformation of soil and different types of embankments and embankment dams.

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Overview

The RST Vibrating Wire Soil Extensometer is developed to monitor lateral and longitudinal deformation of soil and different types of embankments and embankment dams.

The instrument consists of a vibrating wire displacement sensor encased in a sealed body. The body contains a telescopic outer PVC pipe fitted with two flanges and an inner stainless steel rod. One end of the rod is attached to the flange, while its other end is connected to a displacement sensor attached to the other flange. As deformation occurs, the telescopic pipe moves with the soil causing the rod to operate the displacement sensor.


VIBRATING WIRE SOIL EXTENSOMETER SPECIFICATIONS

ITEM SPECIFICATION
Gauge Lengths 1 m and 2 m – with 0.5, 1, 2 and 3 m long extension kits
Sensor Range 50, 100, 150, 200 mm
Accuracy +/- 0.25 % FSR
Resolution 0.02% FSR
Linearity 0.25% FSR
Thermal Zero Shift <0.05% FSR/°C
Operating Temperature -20°C to 80 °C
Instrument Body / Flange Diameter 28 mm / 280 mm
Signal Cable – EL380004 Two twisted pair cable with polyurethane jacket

Vibrating Wire Soil Extensometers are commonly used to monitor lateral and longitudinal deformation of soil and different types of embankments and embankment dams.

View illustrations on how Vibrating Wire Soil Extensometers are used for concrete face rockfill dams.

Vibrating Wire Soil Extensometer Ordering Info

SENSOR RANGES PART #
50 mm (1 m gauge) EXSR-1050
100 mm (1 m gauge) EXSR-1100
150 mm (1 m gauge) EXSR-1150
200 mm (2 m gauge) EXSR-1200
EXTENSION KIT LENGTHS PART #
0.5 m EXSR-0500
1.0 m EXSR-1000
2.0 m EXSR-2000
3.0 m EXSR-3000
FLANGE PART #
End Flange (1 required per chain) EXSR-0000
ITEM PART #
Signal Cable EL380004

File Name

Vibrating Wire Soil Extensometer Manual

Resource Type

Manual
Language Version Download
English EXM0078J

File Name

Vibrating Wire Soil Extensometer

Resource Type

Brochure
Language Version Download
English EXB0011K
Portugese EXB0051A

Speak with an Expert

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