This apparatus consists of a cylindrical glass jar containing a stainless steel wire basket cloth opening 0,063 mm.

The asphalt sample (500 to 2000 g) is placed inside the wire basket, the solvent is poured inside the jar.

Now the wire basket is inserted into the jar which is covered by a stainless steel condenser connected to a water supply.

The apparatus is placed on a hot plate and the boiling solvent drips into the basket dissolving out the bitumen. The filler passing through the mesh basket must be separated using the centrifuge extractor.