Avongard Corner Tell-Tale Crack Monitor 

Monitors horizontal and vertical movement across a crack in a corner.

• 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 millimeters 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. 

Crack Monitoring Applications:

• Use singularly to monitor two-dimensional movement
• Use in pairs to monitor-three-dimensional movement
• Re-configure the crack monitor components to monitor cracks between ceilings and walls or floors and walls.

Fixing Instructions:

1. Use the screws and nuts supplied to fix the adapter to the Tell-Tale.
2. Fix the Tell-Tale across the crack with screws/plugs and adhesive (sold separately)
3. Remove the four pre-set pegs. If the crack opens or closes the cursor moves relative to the calibration scale and can be recorded on the record sheet included on all orders.