The Tell-Tale is hinged enabling it to be used in internal corners of angles between 70 and 180 degrees.
Monitors both internal and external corners.
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 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 (Replacement Crack Record Sheets can be downloaded from here).
Application
Use singly to monitor two dimensional movement.
Use in pairs to monitor three dimensional movement.
Re-configure the Tell-Tale components to monitor cracks between ceilings and walls or floors and walls.
* Sold in single quantities
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