Innovative design The Lshaped crack monitor consists of two overlapping plates. The bottom plate is calibrated in millimeters, while the plate is transparent and marked with a crosshair cursor for measurements. This simple twoplate configuration provides a clear reference for crack movement and easy insitu readings. Practical and accurate tool A dependable measuring tool to monitor wall cracks and their changes over time, making it an essential instrument for construction work and site inspection. Precise measurements XY axis ruler range: 1 mm (0.04 in) with a resolution of 0.5 mm (0.02 in). Horizontal range: 20 mm (0.79 in); vertical range: 10 mm (0.38 in). These specifications support accurate readings of small crack movements to help track progression or stabilization. Durable material Made from acrylic materials for durability and stability. Easy to read with clear monitor results, suitable for onsite use over extended periods. Applications and use scenarios construction monitoring: Attach to critical walls to observe crack development during curing and early loading, helping verify structural behavior. Postevent assessment: Use after seismic activity or heavy loading to document crack evolution and inform safety decisions. Renovation and retrofit projects: Monitor cracks during changes in loads or after alterations to ensure cracks remain within acceptable limits. Key benefits at a glance Clear, twoplate design for straightforward readings Builtin metric calibration with a transparent plate for measurement accuracy Small, precise measurement ranges suitable for monitoring crack movement Durable acrylic construction for longterm site use Versatile for construction, inspection, and safetycritical monitoring