The 8-inch impactor is an industrial equipment with an outer diameter of about 200mm. The matching air compressor will select the appropriate air compressor with reference to the pneumatic pressure required by the impactor. The 8-inch impactor shall be equipped with an air compressor within the range of 8000- 12000PA (Pascal). Pascal (Pa) is a derivative unit used to express the magnitude of orthogonal stress and strain caused by applying 1 Newton force per unit area in the international system of units, and is used to express the pressure in gases and liquids in the engineering field.