Amazon.com: Air Quality Dust Particle Counter, High Sensitivity 6-Channel PM0.3/0.5/1.0/2.5/5.0/10 um Detector Air Dust Particle Monitor,Data Transfer/Storge Pollution Monitor(TC-8200) : Industrial & Scientific
Amazon.com: Triplett EPC175 Particle Counter and Air Quality Meter, Displays Air Temperature, Relative Humidity, Formaldehyde (HCHO) and TVOCs : Automotive