CGEO-CR Vibrating Wire Crackmeters

Description

CGEO-CR Vibrating Wire Crackmeter is suitable for installation on structural surfaces, providing long-term monitoring of the opening and closing of surface cracks or joints. The universal joints at both ends of the sensor allow for a certain degree of shear deformation. The built-in temperature sensor can simultaneously monitor the ambient temperature. With other mounting accessories, it can be configured as a biaxial, triaxial crack meter etc.

Applications

Brick and stone buildings

Bridges and dams

Construction joints

Pipelines

Joints and bearing/support interaction

Tunnels and lining cracks

Structures susceptible to earthquake and landslide areas

Operation

The socket is installed in the first lift of concrete, using an installation plug to prevent concrete entering the socket.

Before the second lift of concrete is cast, the main body is screwed into the installed socket, extended sufficiently (most commonly to its mid-point) to allow for expected joint 

movement, welded or tied to the rebar and then the second lift of concrete is cast.

When both lifts of concrete are complete, the jointmeter is now firmly anchored into each concrete lift and will measure opening or closing of the joint.

The sensing transducer is smaller than the protective body of the jointmeter, therefore a degree of shearing motion is accommodated by universal joint connections within the unit.

Features

Accurate, long-term stability

Long working life, long-term stability and reliability 

Suitable for manual or remote monitoring 

Key Features

Waterproof

Integral thermistor

Specifications