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Amazon.com: Air Quality Pollution Monitor, Formaldehyde Detector, Temperature & Humidity Meter, Sensor, Tester; Detect PM2.5/PM10/PM1.0 Micron Dust, Test Indoor TVOC Volatile Organic Compound Gas; eBook : Industrial & Scientific
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Dienmern Multifunction Air Quality Monitor Pm2.5 Detector Gas Analyzer Dust Sensor Lcd Display Tester Indoor Pollution Meter - Gas Detector - AliExpress
Indoor Air Quality Monitor includes case and batteries - AFC International