Description

Digital Crack Monitoring Sensor for Continuous Structural Assessment

Geokon Model 4420 Crackmeter is a high-precision digital displacement sensor designed for
continuous, real-time monitoring of crack opening and closing in structural and geotechnical applications.

The sensor measures linear displacement across cracks and joints and is widely used in buildings,
bridges, tunnels, retaining walls, and critical infrastructure projects where early detection of
structural movement is required.

Measured Parameters

• Crack opening / closure (linear displacement)

Typical Measurement Range

• ±12.5 mm
• ±25 mm
• ±50 mm
• ±100 mm

Accuracy & Stability

• High long-term stability
• Resolution suitable for sub-millimeter crack movement detection

Data Output & Integration

• Vibrating Wire output
• Compatible with dataloggers and IoT gateways
• Real-time data transmission to monitoring dashboards
• Supports continuous long-term monitoring

Typical Applications

• Structural crack monitoring in concrete and masonry
• Foundation and wall movement monitoring
• Bridge and tunnel structural health monitoring
• Geotechnical and infrastructure projects

infrascan Integration

Geokon Model 4420 Crackmeter is fully compatible with InfraScan monitoring systems and can be integrated
into real-time dashboards for continuous visualization, trend analysis, and automated alerts.

Specific sensor ranges and configurations are selected based on project requirements, crack behavior,
and environmental conditions.