CCS811-811 air quality monitoring Digital Internal gas sensor the CJMCU-811 is an ultra-low-power digital gas sensor that integrates a sensor and a CCS801-bit MCU with an analog-digital converter (ADC) for detecting indoor air quality, including carbon monoxide (CO) and a wide range of Volatile Organic compounds (VOCs). Air quality sensor CCS811 characteristics: Ultra-low power consumption can be used in battery powered equipment high sensitivity, fast heating Intelligent algorithm calculates TVOC / eCO2 values I2C signal output, direct communication with the main system The main characteristics of the air quality sensor CJMCU-811: metal oxide (MOX) sensors to monitor indoor air quality a-bit MCU is integrated to perform the /'first-level algorithm adc built in for sensor readings and digitized conversions I2C slave interface can be connected directly to the master control system Reset / interrupt control. Material: PCB colour: Package Contents: 4 x CJMCU-811 module 4 x pin Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.