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How to measure particle size of powder by air permeability method fisher sub sieve sizer?201-16

How to measure particle size of powder by air permeability method fisher sub sieve sizer?201-16

Air permeability method is a non-destructive testing method for particle size of powders. This method is simple and features good repeatability and accuracy. How does this method work? First of all, the steady air is pumped out by a steady pressure pump. After voltage regulation by voltage regulator tube, dried by drying tube. The dry gas passes through the compacted sample area, then creates a pressure drop. If the powder has a large gap, the pressure drop is small. If the powder has a small gap, the pressure drop is large. The other end is equipped with a U-shaped pressure gauge. The water level varies with the pressure drop. With a reading board, the size of powder can be read directly.

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