• Measures the hardness (compaction) of natural and synthetic playing fields
• Rapidly scans large areas

• Quickly checks for variations during construction

• Identifies the moisture levels of soils

• Enables monitoring of changes over time

This very efficient impact testing device measures the "stiffness" of natural or constructed soil conditions. A known mass, the Clegg Hammer, drops from a fixed distance and deceleration is measured as it hits the ground. Four successive trials provide the Clegg Impact Value which correlates directly with the California Bearing Ratio, the American Society for Testing and Materials (ASTM) #5874, the Texas Class Number, r-value, and Elastic Modulus.