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Gas Sensor Carbon Dioxide Detection Sensor Module CCS811 CO2 eCO2 TVOC Air Quality Detecting I2C Output CJMCU 811 For Arduino| | - AliExpress
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Adafruit CCS811 Air Quality Sensor Breakout - VOC and eCO2 [STEMMA QT / Qwiic] : ID 3566 : $19.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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