This spring-type penetrometer can be used in the field to control soil compaction. The stem is calibrated to 150 lbf x 2 lbf divisions, and a sliding collar indicates the applied load. A rapid estimate of the moisture content of soil can be obtained by comparing the amount of penetration of the needle for a corresponding load, with a laboratory determined moisture/density curve for a similar soil.

Case for Proctor Penetrometer.

An optional carrying case for the penetrometer and needle points. info »

Proctor Penetrometer Spring Type with Adaptor Stem.

Supplied complete with set of needles, 29-3929

info »