Product description A simple, precise acrylic gauge for manual crack monitoring and measurement. Key benefits - Accurate, repeatable readings: the lower plate is calibrated in millimeters and the upper plate has a thin cross-shaped cursor line, allowing you to mark and read crack position changes with precision. - Clear visual alignment: the transparent acrylic sheet and an easy-to-read measuring grid make it quick to line up the gauge with a crack and record measurements. - Durable and low-maintenance: made from high-quality acrylic that is smooth, robust, chemically inert, and resistant to breaking under normal use. - Simple to use in the field: the two overlapping plates provide stable reference points so monitoring can be performed manually without specialized equipment. What it does - Two overlapping plates: one plate is engraved with a millimeter scale; the second, overlapping plate provides a fine crosshair cursor to pinpoint and mark the exact crack position. - Transparent construction: the clear acrylic lets you see the underlying surface and grid lines simultaneously, improving placement accuracy and recording. - Long-term monitoring support: designed to help track crack width and displacement over time by enabling consistent, repeatable measurements. Key attributes - Function: manual crack-monitoring gauge for recording crack position and change. - Scale: calibrated in millimeters for precise measurement. - Cursor: thin, cross-shaped line for exact alignment. - Material: high-quality acrylic—durable, smooth, chemically inert, and not easily broken. - Readability: clear measuring grid for fast visual interpretation. Typical applications - Building inspections: monitor wall cracks in residential or commercial structures to document movement and assess repair needs. - Renovation and remodeling: track crack development before, during, and after construction work to determine if interventions affect existing cracks. - Maintenance and safety checks: use during routine structural checks to create a measurement log showing stabilization or progression of cracks. How it helps you - Provides a consistent reference so measurements taken at different times are comparable. - Reduces guesswork by giving clear, millimeter-based readings and an exact cursor alignment. - Saves time during inspections with an easy-to-read grid and transparent view of the crack. What to expect in use - Place the gauge over the crack, align the crosshair cursor, and use the millimeter grid to record the position. - Repeat measurements periodically to build a simple, accurate record of crack behavior over time. No special tools required—this is a compact, manual gauge designed for practical, repeatable crack monitoring and measurement.