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8-in-1 Air Quality Monitor Indoor, Portable CO2 Detector, WiFi Home Indoor Air Quality Tester (CO2, PM2.5, PM10, PM1.0, HCHO, TVOC, Humidity, Temp) : Amazon.co.uk: DIY & Tools
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CO2 Detector，3-in-1 Ambient Air Monitor,Tester for Carbon Dioxide，Temperature and Relative Humidity， Air Analyzer Digital CO2 Meter with Alarm for Homes, Cars，Grow Tents, Wine Cellars（TC-10A） : Amazon.co.uk: DIY & Tools
AVICHE CO2 detector, Indoor Air Quality Monitor,CO2 Sensor with Temperature & Humidity, Carbon Dioxide Detector, CO2 Detector : Amazon.co.uk: DIY & Tools
