HMK-C1 blaine apparatus determines the fineness of hydraulic cement, using the Blaine air-permeability method. It completely meets ASTM C204 Standard Test Methods for Fineness of Hydraulic Cement by Air-Permeability Apparatus Test Method A using the manually operated standard Blaine apparatus. HMK-C1 has become the best and most frequently used particle size analyzer in industries of non-porous powder materials such as cement, ceramics, abrasives, metals, coal and gun powders.