Digi-Sense Mini Particle Counter with Bluetooth® Connectivity: Amazon.com: Industrial & Scientific
Amazon.com: Triplett EPC175 Particle Counter and Air Quality Meter, Displays Air Temperature, Relative Humidity, Formaldehyde (HCHO) and TVOCs : Automotive
CEM DT-9850M Particle Counter Dust Monitor Professional Cleanroom Tester Laser Air Detector Data Logger PM2.5 PM10 with 2.8" Color TFT LCD Display Channel 0.3,2.5,10μm Temperature Humidity Measure: Amazon.com: Industrial & Scientific