The world’s smallest, most-versatile aerosol monitor/data logger, the personalDataRam, provides real-time measurement and direct readout of concentrations of airborne dust, smoke, mists and fumes. A new model for active sampling, the pDR-1200 uses an attachable pump module or separate sampling pump to perform particle-size selective measurements. Compact, lightweight and easy-to-use, it is ideal for respirable, thoracic and PM2.5 monitoring, as well as continuous emissions and test-chamber monitoring.