When we determine the flow rate of metal powders we need original Chinese Emery.It is used to calibrate the flowmeter funnel.It is a standardized emery grit used to periodically checking the calibration accuracy of the hall flow meter funnel.When the accuracy of the hall funnel goes out of permitted tolerances,user has to purchase a new hall flowmeter funnel for replacement.Such powder is manufactured by HMKTest only.

HMKTest produces AS-300 series of hall flowmeter including AS-300A automatic intelligent hall flowmeter and AS-300M manual type hall flowmeter.

AS-300A Automatic Hall Flowmeter

 
AS-300 Hall Flowmeter History