ASTM B 213 Standard Test Method for Flow Rate of Metal Powders recommend the hall flow rate be checked using Chinese emery calibration powder periodically, at least every six months, using the procedure outlined in No.9 Calibration of Apparatus steps 9.1.1-9.1.5.
AS-300 Hall Flowmeter
Manufacturer
-AimSizer Scientifc is a world leading and reliable manufacturer of Hall Flowmeter/Hall Flow Meter Funnels and Carney Funnels. All the metallic parts are processed and supplied by qualified subcontractor according to International Standards in order to make the unit accurate and robust to satisfy the user's requirement at cost-effective basis.
-AimSizer is also a major research participant in the interlaboratory study of the flow of Chinese Emery. Chinese Emery is used to calibrate a flowmeter funnel by the manufacturers.
-AimSizer is also the original manufacturer of Chinese Emery according to ASTM B213 and other international standards using such certified reference material.
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