Key benefits Dualplate Lshaped crack monitor provides clear, beforeandafter readings to help you track crack movement over time. Transparent plate with a crosshair cursor improves visibility and measurement accuracy. Bottom plate is millimeter calibrated for precise reference marks on the movement scale. Easy to install: secure the two plates together, then fix to the wall with screws and expansion screws for stability. Durable and stable: acrylic construction offers longlasting use and easy readability. What makes it stand out Straightforward, measurementsfocused design that concentrates on function and accuracy. Clear horizontal and vertical movement ranges enable reliable readings in smallscale crack monitoring. Lightweight, noncorroding acrylic build suitable for monitoring crack development on various wall surfaces. How it works Two overlapping plates form a stable crackmonitoring system. The bottom plate provides a millimetercalibrated baseline. The plate is transparent with a crosshair cursor for precise measurements against the baseline. Readings are taken across the XY axis with the ruler and range markers to quantify movement. Specifications Design: Lshaped crack monitor with two overlapping plates Bottom plate: calibrated in millimeters plate: transparent with crosshair cursor for measurements XY axis ruler range: 1 mm (0.04 in) with a resolution of 0.5 mm (0.02 in) Horizontal movement range: 20 mm (0.79 in) Vertical movement range: 10 mm (0.38 in) Material: acrylic Mounting: secured to the wall with screws and expansion screws for stability Easy to install Align the two plates, secure them together, then fix to the wall using standard screws and expansion screws. Designed to provide stable monitoring with straightforward setup and minimal maintenance. Material and performance acrylic construction combines durability with clear visibility of readings. The transparent plate and crosshair provide easy alignment and accurate measurement, reducing reading errors over time. Use scenarios Residential wall monitoring: track crack progression in basement or living area walls after settlement or temperature changes, enabling timely maintenance decisions. Renovation or remediation projects: monitor concrete slab or partition crack movement during stabilization work to verify effectiveness. Historic or masonry buildings: observe crack behavior around openings or along loadbearing walls without introducing metal components that may corrode or damage delicate substrates.