Crack Monitoring Gauge, Standard for flat surface
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Standard model Tell-Tale for monitoring horizontal and vertical crack movements in buildings & structures.
Range: horizontal ± 20 mm, vertical ±10 mm.
Accuracy of measurement: 0.5mm.
Tough clear polycarbonate. Size 145mm x 30mm.
For attachment with screws or epoxy adhesive (not included).
Supplied with record sheet for up to 8 readings - can be photocopied.