Used to determine the moisture content at which clay soils pass from a plastic to a liquid state. They are identical in shape and differ, generally, from the type of base and weight of the cup. Comprises: removable brass cup, adjustable crank and cam mechanism, blow counter, and base. Different  versions are available conforming to the various Standards in use. Furthermore all versions are available either manually or motor operated. The grooving tools, which also refer to the different Standards.

Weights approx.: 

Motorized versions 4 kg

Standard versions 2 kg.