This equipment is used to determine the bitumen percentage in bituminous paving mixtures.
It has a removable, precision machined, aluminum rotor bowl, mounted on a vertical shaft. A filter paper disc is pressed in between the rotor bowl and cover plate by tightening a knurled nut.
The bowl assembly is enclosed in a housing mounted on a cast body. In the electrical operating model, the rotor bowl is coupled to a motor. The solvent may be introduced during test through a cup on the housing cover.
This equipment is electrically operated with an in-built dimmerstat for speed variation from 0rpm to 3600rpm. Each unit is supplied with a set of 25 filter paper discs.