Cracks Tell monitors are simple and reliable analog crack monitoring devices. Key specifications Horizontal measurement range: ±20 mm (±0.79 in) Vertical measurement range: ±10 mm (±0.38 in) X and Y axes markings: marks every 1 mm (0.04 in) Measurement accuracy/discrimination: ±0.5 mm (±0.02 in) Tracking capability A builtin scale is used to record crack length and how cracks evolve over time along the measured path. Benefits Clear, immediate visual indication of crack growth for quick assessment in testing and inspection Precise axis markings and controlled accuracy enable detailed crack progression analysis Simple analog design supports straightforward setup and operation in a variety of lab environments Compact form factor facilitates easy integration into standard testing or inspection benches Use scenarios Materials testing and fracture experiments: monitor crack initiation and propagation under cyclic or static loading to study growth behavior Welds and structural components QA: observe and document crack development in joints and critical parts during stress or fatigue tests Educational demonstrations: illustrate crack growth concepts in classroom or training labs with a tangible analog display