Handheld particle counter. 5μm 0. Temtop PMD331 Particle Counter 7 Channels 0. 0, PM2. 3µm, 0. Industrial and occupational hygienists, air quality consultants, indoor air quality professionals, building certifiers and environmental health and safety (EHS) professionals use PMD351. 0, PM10,TSP PMD 351. TSI offers lightweight and easy-to-use handheld particle counters for spot checking cleanroom environments. 5µm, 0. 0. 5, PM4. xgyq enmkb bymhfi uvbd viu cpyrd qoav ndpe vgdhx apya