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Amazon.com: BILIPALA CO2 Monitor, Air Quality Monitor Indoor, Carbon Dioxide Detector with Alarm, Temperature, Relative Humidity and co2 Meter, Air Monitor for Homes, Schools, Offices, Wine Cellars- 502ABM, Black : Industrial &
Amazon.com: CO2 Meter Portable CO2 Detector Digital CO2 Monitor with Alarm Function Carbon Dioxide Temperature and Humidity Meter, NDIR CO2 Sensor Indoor Air Quality Monitor for Home Office Grow Room : Industrial
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Amazon.com: GZAIR WiFi Air Quality Monitor Detects Carbon Dioxide, PM2.5, 1.0, TVOC, Temperature, and Humidity, IoT Controller with Relay Function, Data Logger, Smart Home (Only Supports 2.4 GHz Wi-Fi) : Industrial &
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Amazon.com: CO2 Meter Portable CO2 Detector Digital CO2 Monitor with Alarm Function Carbon Dioxide Temperature and Humidity Meter, NDIR CO2 Sensor Indoor Air Quality Monitor for Home Office Grow Room : Industrial