The basic Tell-Tale crack monitoring gauge that monitors horizontal and vertical movement across a crack on a flat surface to an accuracy of +/- 1.0mm and by interpolation to +/-0.5mm.

The bottom plate is calibrated in millimetres and the top plate is transparent and marked with a hairline cursor in the form of a cross.

Fix using screws and adhesive (not included but available as accessories)

Supplied with full instructions and Crack Record Sheet

How to Use

The Tell-Tale is fixed across the crack using screws and plugs and/or adhesive. Then remove the 2 pins/plugs.

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.