The Aeroqual Ranger | Dust Sensor Head is a real-time, active sampling monitor that integrates a laser optical particle counter and particle binning. It samples, logs, and displays PM1, PM2.5, PM4 (respirable), PM10, TSP, temperature, and relative humidity. Mass calculations apply corrections using Kohler theory. In addition, Ranger | Dust features an omnidirectional inlet designed for accurate sampling at any angle.