... -to-use machine; 2. Portable, six size channels, 3. Built-in printer CLJ-BII(D) Airborne Particle Counter Features:1. 1 ... cfm (28.3 lpm) flow rate2. Large LCD display3. 2 counting modes()4. ... particle-size channels (0.3, 0.5, 1.0, 2.0, 3.0, 5.0µm)5. Date and time ... ±10%,50Hz±2HzSize Channel0.3, 0.5, 1.0, 2.0, 3.0, 5.0(µm)Sample Period1min~10minClockDate and ...