... Calculation:Federal Standard 209E Calculation 2. Large flow rate of 1cfm(28.3L/min) with large LCD display. Features:1. 1 cfm (28 ... .3 lpm) flow rate;2. Large LCD display;3. 2 counting modes;4. Six particle-size channels ... (0.3, 0.5, 1.0, 2.0, 3.0, 5.0µm);5. Date and time display;6. Federal ... Serial port(RS232/485) CLJ-BII(D) Laser airborne particle counter