The Proctor Penetrometer (Spring Type) consists of a body housing, spring, plunger calibrated to read 0-40 kg x 1 kg and a handle. Proctor Penetrometer has a long stem and a short stem, both graduated at 12.5mm intervals to indicate the depth of penetration and for use with needles of larger and smaller areas respectively. Complete with needle point set comprising one each of 0.25, 0.5, 1, 1.5, 2, 3.5 & 6 sq. cm & tommy pin.
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