The Geo Corner Tell Tale crack monitoring gauge is a simple instrument for monitoring the movement of cracks in corners.
The corner tell-tale is supplied with two halves which are placed on either side of the crack situated in the corner of the structure. When placed together they form a high effective, reliable solution for monitoring the crack.
The 90 degree acrylic plate has been designed to allow the corner tell tale to be securely fixed either wall-to-wall or wall-to-floor depending upon the location of the crack.
Features a precision silk screened grid, detailing both positive and negative graduations to an accuracy of +/- 1.0mm and by interpolation to +/-0.5mm.
A fine red crosshair allows for accurate estimation. Using the crack monitoring sheets supplied, the surveyor can accurately record the movement over a period of time.
Fixing In Place
The Corner Tell-Tale is fixed across the crack using screws and/or adhesive. Ensure the red line is centered in the grid.
As the crack opens, or closes, the cursor moves relative to the calibration scale. The opening or closing of the crack is then recorded on the crack record sheet supplied.
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