Application
Avongard Tell-Tales consist of two plates which overlap for part of their length. The bottom plate is calibrated in millimeters and the overlapping plate is transparent and marked with a hairline cursor.
- Suitable for both internal and external use.
- Record cards available for each type of Tell-Tale.
- Calibrated in millimetres.
- Manufactured in vandal resistant polycarbonate (Plus) or acrylic (Standard).
- Co-efficient of thermal expansion: 7.0 x 10-5 cm/cm° Centigrade for temperatures between –30° to +30°C
- Manufactured to conform to BS EN ISO 9002:199
Standard Tell-Tale
Avongard standard tell-tale is a basic tell-tale for monitoring horizontal and vertical movement across crack in a flat surface to an accuracy of 1.00 mm.
Tell-Tale Plus
Avongard tell-tales plus are for monitoring for monitoring horizontal and vertical movement across crack in a flat surface to an accuracy of 1.00 mm with an option to use a digital caliper for easy monitoring and to a higher accuracy of 0.1mm.
Corner Tell-Tale Plus
Corner Tell-Tale Plus reconfigured so that cracks at the junction of ceilings, walls and floors can be monitored. 
Displacement Tell-Tale Plus
A Tell-Tale that monitors displacement and horizontal movement where there is a 'step' across the crack due to displacement or 'out of plane' movement
Stainless Steel Disc
Avongard stainless steel monitoring disc is for use with caliper set.
Avonmarks
Avonmarks is to be read with caliper set.
