CCS811 Air Quality Sensor Module for eCO2 and TVOC Detection with I2C Interface

The CCS811 air quality sensor module is an ultra-low power digital gas sensor solution designed for indoor air quality monitoring. It integrates a metal oxide (MOX) gas sensor capable of detecting a wide range of volatile organic compounds (VOCs), along with an onboard microcontroller unit (MCU) that includes an analog-to-digital converter (ADC) and an I2C interface. The CCS811 sensor provides equivalent CO2 (eCO2) and total volatile organic compound (TVOC) measurements, making it a compact and efficient solution for air quality assessment in smart homes, wearables, and portable devices.

The sensor operates on a supply voltage of 1.8V to 3.6V and features multiple operating modes that allow users to optimize power consumption for different application requirements. In Mode 1, the average supply current is 30 mA, while the peak current in Modes 2 and 3 reaches 54 mA. The module has a power consumption of 60 mW and supports an operating temperature range of -40°C to +85°C, with a relative humidity range of 10% to 95% (non-condensing). The CCS811 offers a product lifetime of more than 5 years, ensuring long-term reliability for continuous monitoring applications.

This digital gas sensor module communicates via an I2C interface with a default address of 0x5A (alternatively 0x5B), allowing straightforward integration with popular microcontroller platforms such as Arduino boards. The sensor includes an IAQ threshold alert feature that triggers an interrupt when the concentration exceeds a user-set threshold, and it supports multiple measurement cycles including every second, every 10 seconds, every minute, every 250 milliseconds, and a sleep mode. These features make the CCS811 an excellent choice for air purifiers, ventilation systems, smart home devices, and automotive air quality detection.