ASTM B330 Standard Test Method for Fisher Number of Metal Powders and Related Compounds

The Fisher sub-sieve sizer consists of an air pump, an air-pressure regulating device, a precision-bore sample tube, a standardized double-range air flowmeter, and a calculator chart. Included is accessory equipment consisting of a plug manipulator, powder funnel, two porous plugs, a supply of paper disks, and a rubber tube support stand.