... -use machine; 2. Portable, six size channels, 3. Built-in printer CLJ-BII(D) Airborne Particle Counter Features:1. 1 cfm (28 ... ) flow rate2. Large LCD display3. 2 counting modes()4. Six particle-size channels (0.3, 0.5, 1.0, 2.0, 3 ... accessoriesSerial port(RS232/485) LCD screen & big flow rate Air Particle Counter