CCS811 Digital Gas Sensor Module

The CCS811 is a digital gas sensor module that monitors indoor air quality by measuring equivalent CO₂ (eCO₂) and Total Volatile Organic Compounds (TVOCs). Based on the AMS CCS811 sensor chip, this module integrates a metal oxide (MOX) gas sensor with a microcontroller for onboard signal processing and I²C digital output, making it ideal for smart home, HVAC, and environmental monitoring applications.

With high sensitivity and low power consumption, the CCS811 is perfect for IoT devices and air quality monitoring systems.

Key Features:

• Dual Air Quality Sensing: Measures eCO₂ (400–8192 ppm) and TVOC (0–1187 ppb) levels in real time

• Digital I²C Interface: Simplifies communication with microcontrollers like Arduino, ESP8266, ESP32, and Raspberry Pi

• Integrated MCU: Handles onboard processing, baseline correction, and calibration

• Low Power Consumption: Designed for portable and battery-operated applications

• Compact & Easy to Integrate: Small form factor fits easily into custom enclosures and sensor arrays

Specifications:

• Operating Voltage: 3.3V (not 5V tolerant – use logic level shifter if needed)

• Current Consumption:

  • Idle Mode: ~1.2 µA

  • Active Mode (1s measurement interval): ~19 mA

• Measurement Range:

  • eCO₂: 400 – 8192 ppm

  • TVOC: 0 – 1187 ppb

• Interface: I²C (Default Address: 0x5A)

• Board Dimensions: Approx. 20mm x 15mm

• Preheat Time: ~20 minutes for accurate readings

• Optional NTC Thermistor Support: For temperature compensation

Applications:

• Indoor air quality monitoring

• Smart home automation

• IoT-based environmental sensing

• HVAC and ventilation control

• Educational and research projects

The CCS811 module is a reliable and compact choice for developers building air quality-aware applications or integrating gas sensing into smart systems.