Labtron Portable Airborne Particle Counter with a 0.1 CFM, 2.83 L/min flow rate, and 6 particle size channels (0.3 µm to 10.0 µm). Supports Class 100 to 300,000 testing with 10 levels (1 to 10 min). It operates from 10 °C to 35 °C and includes a built-in thermal printer for easy data output.