Specifications 6 size channels 0.3, 0.5, 1.0, 2.0, 5.0, 10.0 µm Flow Rate 0.1 cfm (2.83 L/min) controlled by internal pump Count Modes Concentration, totalize, audio Counting Efficiency 50% @0.3 µm; 100% for particles > 0.45 µm (per JIS B9921:1997) ...