201-64 What does the water level of the pressure gauge of fisher sub sieve sizer?

During the measurement of the particle size analyzer, there are gaps between measured powder particles, and the compressed air will produce a certain pressure drop ΔP after passing through the measured powder layer. When the quality of the measured powder is constant, the larger the particles are, the larger the spaces between the particles, and it is easier the air to penetrate. The smaller the pressure drop ΔP is, the higher the water level of u-shape pressure gauge is, which means the larger the indicating particle size value on reading board is. On the contrary, if the particle diameter is small, it is hard for the air to penetrate, the ΔP is big, that means the indicating particle size value on the reading board is small. The values measured by HMK-22 Fisher sub sieve sizer are the average diameter of the powder surface area.

HMK-22 Fisher Sub-sieve Sizer and Fisher Scientific Sub-sieve Sizer Model 95 Parts Supplier Price Manual