A precision crack monitor for flat surfaces that makes it simple to record and track crack movement over time, helping you detect structural changes and plan repairs accurately. Key benefits - Accurate, repeatable measurements: 0.5 mm (0.02 in) resolution with a vertical measurement range of 10 mm (0.38 in) lets you detect small changes in crack width or displacement. - Two-axis tracking: Built-in X–Y grid with 1 mm (0.04 in) accuracy and a 20 mm (0.79 in) horizontal range enables precise tracking of both horizontal and vertical movements on flat surfaces. - Clear visual records: A transparent top plate with a thin marked cursor and a tick-marking function make it easy to mark and document crack position and movement for comparison over time. - Simple, reliable use: The calibrated base plate (millimetres) and transparent top plate fit together easily and securely for stable readings without complicated setup. Key features and specifications - Vertical resolution: 0.5 mm (0.02 in) - Vertical range: 10 mm (0.38 in) - Horizontal grid accuracy: 1 mm (0.04 in) on both X and Y axes - Horizontal range: 20 mm (0.79 in) - Tick marking function to mark crack position and movement - Calibrated base plate (millimetres) and transparent top plate with thin marked cursor - Designed for use on flat surfaces; the two plates fit together securely for consistent measurements How it solves problems - Early detection: Measure small displacements reliably so you can identify developing issues before they become larger or more expensive to repair. - Clear documentation: Use the tick-marking function and grid to create straightforward, repeatable records for inspections, maintenance logs, or engineering assessments. - Practical and low-tech: No power or electronics required—this device provides immediate visual measurements that are easy to interpret and archive. Practical applications (use scenarios) - Building maintenance: Monitor wall and ceiling cracks in residential or commercial buildings to decide when repairs are necessary and to document progression between inspections. - Civil infrastructure inspections: Track crack movements on flat concrete surfaces such as retaining walls, bridge components, and tunnel lining patches during routine inspections. - Historic structure conservation: Record small movements in masonry or plaster cracks to support preservation plans and provide conservative intervention timing. User guidance - Apply the device to a clean, flat surface spanning the crack. Align the calibrated base plate, place the transparent top plate over it, and use the marked cursor and tick function to record the initial position. Re-measure periodically and compare ticks/grid positions to quantify movement. This crack monitoring recorder combines straightforward operation with precise, millimetre-calibrated measurement to support consistent, professional-level crack monitoring and documentation.