Proctor Penetrometer, Spring Type
Designed for use in the field for controlling soil compaction
by initial calibration from laboratory tests for
moisture density relationship.The instrument consists
of a barrel housing a spring.
A piston compresses the spring and the piston rod is
calibrated upto 40 kg in 1 kg divisions. Two penetration
stems which can be attached to the other end of
the spring barrel, one at a time, to suit the needle point
being used, are graduated in 1.25 cm divisions.
Supplied with eight needles of 6.0, 5.0, 3.0, 2.0, 1.5,
1.0, 0.5 and 0.25 cm2 area. Complete in a wooden