Vibrating Wire Rod Extensometer is used to measure displacement of the surrounding ground, strain of a slope, and horizontal/vertical displacement of soils and rock bases in a tunnel which are caused by concentrating on excavation working at underground such as a tunnel, a communication duct, and a common utility duct. Once displacement happens due to movements, relaxation, and joints of rock bases, it is delivered to a rod by an anchor and measured by a displacement sensor.
Vibrating Wire Rod Extensometer
Type Vibrating Wire Range 50mm Resolution 0.025% range Accuracy ±0.2% full scale Operating temperature -20°C ~ +80°C Dimensions Sensor OD 34mm
Rod OD 26mm
Length 2,3,4,6,8 M
Measuring points : 3,4,5P
Borehole size for installing Approx. 38mm