Proving Ring

This is for determining the bearing capacity of sub-grade soils or for compaction control
and meets the requirement of astm d-420. Consists of a sturdy handle under which is
􀁅ixed a sensitive proving ring. An extension piece is 􀁅ixed on to the bottom of the proving
ring and carries the detachable penetration cone at its tip. Proving ring capacity is 130 kg
and the .002 mm dial indicator is provided, indicates the penetration load applied with a
sensitivity of approx. 12 kg. Division. A calibration chart is provided for the proving ring.
Instrument is complete in wooden carrying case.