Concrete Crack Monitors & Crack Measurement Gauges

Choose a Movement Monitor or a Width Card

Crack monitoring equipment falls into two main groups. Installed movement monitors track how a crack changes over time: the two-plate Concrete Crack Monitor Plus and the Concrete Crack Ruler Gauge Kit are fixed across the crack so relative movement can be read at each inspection.

Handheld width cards document crack width at a moment in time. Compare the Crack Width Gauge Card for Concrete and the Crack Comparator Card for mapped width ranges, and use crack monitoring discs where a simple point marker is enough. A card records width; it does not monitor movement between visits.

Handle Corners, Displacement and Digital Logging

Cracks at corners and edges move in more than one plane, so pair a standard monitor with the Concrete Monitor Crack Corner Adapter where movement is not purely horizontal. Check the adapter's compatibility with the selected monitor before ordering.

For continuous or higher-precision tracking, compare the Concrete Crack Data Logger and the digital crack monitoring kit with 0–6in caliper. Verify logging intervals, range and data access against the monitoring program rather than assuming every digital option records the same measurements.

Install Properly and Record Over Time

Secure monitors across the full crack width using the fastening method the manufacturer specifies, with the measurement grid visible and protected. Confirm the surface is sound and clean at both anchor points before installation, since a loose monitor produces unreliable readings.

Record a baseline reading at installation, then re-read at regular intervals with the same instrument and note date, location and conditions. Comparing readings over time shows the rate and direction of movement; for related condition checks, review non-destructive concrete testing equipment.