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The basic principle behind the Clegg Impact Soil Tester is to obtain a measurement of the deceleration of a free falling mass (Hammer) from a set height onto a surface under test.
0.5 kg Clegg Impact Soil Tester
4.5 kg Clegg Impact Soil Tester
Pelican Carrying Case with Custom Foam
The standard test protocol is to drop the hammer four consecutive times on the same location with the highest value result in the series taken as the Peak Clegg Impact Test result. The Clegg offers the convenience of rapidly scanning compaction variation over large areas.