This is used for a quantitative determination of bitumen in hot-mixed paving mixtures and pavement samples. The centrifuge extractor is a safe, portable, corrosion-resistant model, which can be used both in the field and the laboratory it consists of removable cast aluminium rotor bowl mounted on a vertical shaft. A filter paper disc is pressed in between the rotor bowl and cover plate by a knurled nut. The bowl assembly is enclosed in a housing mounted on a cast aluminium body The gears operate in oil bath with splash lubrication. Complete with 25 filter discs.The motor drive gives 3500 r.p.m. to the rotor bowl. Operation on 230 Volts Single Phase, 50 cycles. A.C. supply.