Standard Tell-TaleBack to Tell-Tales
Avongard Tell-Tales are precision gauges that consist of two plates which overlap for a part of their length. The bottom plate is calibrated in milli-metres and the top plate is transparent and marked with a hairline cursor in the form of a cross.
This Avongard Standard Tell-Tale enables you to monitor movement of up to +/- 20mm.
If you require a greater movement, the Plus Tell-Tale can monitor movement of up to +/- 25mm and can be viewed here.
This product is supplied with fixing instructions and Crack Record Sheet.
Please note: Screws and adhesive for fixing are not included but are available in the accessories category.
Fixing the Tell-Tale
The Tell-Tale is fixed across the crack using screws and plugs and/or adhesive.
Monitoring Crack Movement
The two pegs are removed. 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.