VW Crackmeter

Model : GV-2403

The VW gauge operates on the principle that a tensioned wire, when plucked, vibrates at its resonant frequency. The square of this frequency is proportional to the strain in the wire. Around the wire is a magnetic coil which when pulsed by a vibrating wire readout or VW data logger interface plucks the wire and measures the resultant resonant frequency.

A change in distance between the anchors caused by the crack opening or closing causes the inner free-sliding rod to move within the outer body which changes the tension on the spring and the vibrating wire thus altering the resonant frequency of the wire.

Features

• Displacement monitoring
• Use for Rod Extensometer
• Robust design & Simple structure
• Stainless steel Housing
• High accuracy & resolution
• Long term stability
• Stable Vibrating Wire signal

Specification

Items	GV-2403
Range	50mm, 100mm, 150mm, 200mm
Rated Output	Hz2 x10-3 digit
Non-Linearity	Less than 0.1% Rated Output
Working Temperature	-20°C ~ 80°C
Outer Diameter	19mm
Overall Length	Approx 300mm