Real-Time Dust Monitoring Takes a Giant Leap Forward! Only the new DustTrak™ DRX Aerosol Monitor can simultaneously measure both mass and size fraction - no other monitor can do both. The DustTrak DRX desktop monitor is a battery-operated, data-logging, light-scattering laser photometers that give you real-time aerosol mass readings. It uses a sheath air system that isolates the aerosol in the optics chamber to keep the optics clean for improved reliability and low maintenance. The DustTrak DRX is suitable for clean office settings as well as harsh industrial workplaces, construction, environmental sites, and other outdoor applications. The DustTrak DRX monitor measures aerosol contaminants such as dust, smoke, fumes, and mists.