CCS811 Gas Sensor
- CCS811 digital air-quality sensor for measuring Total Volatile Organic Compounds (TVOC) and equivalent CO₂ (eCO₂) levels.
- Uses an integrated metal-oxide gas sensing element with an I2C digital interface for easy connection to Arduino, ESP32 and other microcontrollers.
- Ideal for indoor air-quality monitoring, smart-home systems, environmental monitoring, HVAC projects and IoT applications.
SKU: ccs811-gas-sensor
CCS811 Digital Gas & Air Quality Sensor
The CCS811 is a compact digital gas sensor designed primarily for indoor air-quality monitoring. It uses a heated metal-oxide (MOX) sensing element to detect a broad range of volatile organic compounds (VOCs) present in the surrounding air and provides processed air-quality readings through its digital interface.
The sensor reports Total Volatile Organic Compounds (TVOC) and equivalent carbon dioxide (eCO2) values. The eCO2 value is an estimated equivalent CO₂ level derived from the sensor's gas response and should not be treated as a direct measurement of atmospheric CO₂ concentration. The sensor responds to groups of compounds including alcohols, aldehydes, ketones, organic acids, amines and hydrocarbons.
Communication is provided through an I2C interface, making the CCS811 straightforward to integrate with Arduino, ESP32 and other compatible microcontroller platforms. The device supports configurable measurement modes and an interrupt function for data-ready or threshold events.
The CCS811 requires an initial burn-in period and a stabilization period after extended inactivity for best results. Calibration and environmental compensation are also important when greater measurement consistency is required.
| Product Type | Digital Gas / Air Quality Sensor |
|---|---|
| Sensor | CCS811 |
| Sensing Technology | Metal-Oxide Semiconductor (MOX) |
| Primary Measurements | TVOC and equivalent CO2 (eCO2) |
| eCO2 Range | 400 to 8192 ppm |
| TVOC Range | 0 to 1187 ppb |
| Detectable Compounds | Alcohols, aldehydes, ketones, organic acids, amines, aliphatic hydrocarbons and aromatic hydrocarbons |
| Interface | I2C |
| I2C Address | 0x5A |
| Sensor Supply Voltage | 1.8V to 3.6V |
| Measurement Modes | Configurable measurement intervals, including approximately 1 s, 10 s, 60 s and 250 ms modes |
| Warm-Up / Conditioning | Requires initial burn-in and conditioning for stable readings |
| Applications | Indoor air-quality monitoring, smart homes, HVAC, environmental monitoring and IoT |
| Compatible Platforms | Arduino, ESP32 and other I2C-compatible microcontrollers |
| Module Type | Digital air-quality / gas sensor breakout module |
