The Portable Particle Counter Model 3910 from Kanomax USA is a small, lightweight, 50 liter-per-minute portable particle counter. The unit has a large, full-color touchscreen with an optimized user-friendly interface that is simple to operate. The instrument is compliant with ISO 21501-4 and 21 CFR Part 11. It can simultaneously measure and display six particle sizes, and has built-in data storage for up to 10,000 measurements. The optional Climomaster Environmental Sensor allows users to measure airflow, temperature, and humidity, which is ideal for monitoring both cleanrooms and hospital surgical rooms.