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Gravity: STCC4 True Carbon Dioxide (CO2) Sensor (3-in-1 Air Quality Monitoring, 400 ~ 5000ppm)

Name: Gravity: STCC4 True Carbon Dioxide (CO2) Sensor (3-in-1 Air Quality Monitoring, 400 ~ 5000ppm)
Brand: DFRobot
SKU: DF-SEN0678
Price: 36.65 AUD
Availability: InStock

· MPN: SEN0678

Gas & Air Quality Sensors Humidity Sensors Sensors Temperature Sensors Environmental (temperature, humidity, air quality) DFRobot Sensors & Modules Arduino Sensors Raspberry Pi Sensors

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This Gravity air quality module uses Sensirion’s STCC4 gas sensing chip to directly measure carbon dioxide with the thermal conductivity measurement principl...

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This Gravity air quality module uses Sensirion’s STCC4 gas sensing chip to directly measure carbon dioxide with the thermal conductivity measurement principle. It is designed for compact, cost-effective indoor monitoring nodes where stable CO₂ readings are needed without complex hardware integration.

An onboard SHT40 sensor adds ambient temperature and humidity measurement, giving you three environmental values from one module. The temperature and humidity data are also used for automatic compensation of CO₂ readings, while the built-in Automatic Self-Calibration algorithm supports long-term stability.

The module communicates over a standard Gravity I2C interface and operates from 3.3 V to 5 V, making it suitable for Arduino, ESP32 and Raspberry Pi projects. The plug-and-play Gravity connector helps avoid soldering, breadboards and level-shifting in typical setups.

It is supplied with the Gravity STCC4 CO2 Sensor x1 and Gravity 4Pin Cable x1, and is well suited to indoor air quality monitors, HVAC automation, smart home systems, classrooms, IoT nodes and STEM experiments.

Features:

High measurement accuracy: Based on the TC principle for stable and reliable data
Low power consumption: Suitable for battery-powered or always-on systems
Compact size: Easy to integrate into space-constrained and modular design
Digital output: I2C interface with strong anti-interference capability
Plug and play: Standard Gravity interface, no soldering required

Specifications:

Supply Voltage: 3.3–5.0 V DC
Operating Temperature: 10°C ~ 40°C
Operating Humidity: 20% ~ 80% RH (non-condensing)
Operating Current Peak: 4.2 mA
Operating Current Continuous Measurement: 950 μA
Operating Current Single-shot Mode: 100 μA (10s sampling interval)
Operating Current Deep Sleep: 1 μA
CO₂ Measurement Range: 400–5000 ppm
CO₂ Accuracy: ±(100 ppm + 10% of reading)
Response Time: 20 s
Interface: Gravity I2C

Jargon buster

Plain-language definitions for the technical terms used above.

Automatic Self-Calibration: Automatic Self-Calibration is a built-in routine that adjusts the sensor over time to reduce drift in its readings. It matters for long-running indoor monitors because it can help keep measurements stable without frequent manual calibration.
DC: DC means direct current, where electricity flows in one constant direction, as supplied by batteries, USB ports and many plug-pack power supplies. When a product specifies DC, it runs from a DC supply rather than mains AC, so you need to provide the correct voltage and polarity.
deep sleep: Deep sleep is a low-power mode where the microcontroller turns off most functions while keeping just enough circuitry active to wake up later. It is important for battery-powered projects because it can greatly extend how long the device runs between charges.
ESP32: ESP32 is a family of low-cost microcontroller chips and modules from Espressif with built-in WiFi and Bluetooth. They support programmable firmware and over-the-air updates, and are commonly programmed with toolchains such as the Arduino core and ESP-IDF.
Gravity: Gravity is DFRobot’s plug-in connector system for sensors, motors and modules, using standard cables to reduce loose jumper wiring. It matters because Gravity-compatible parts can connect directly to these ports, while non-Gravity parts may need adapters or manual wiring.
I2C: I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
IoT: Short for Internet of Things, meaning physical devices that connect to networks or the internet to send data or be controlled remotely. It matters if you want projects such as connected sensors, remote controls or classroom data-logging activities.
ppm: ppm means parts per million, a common way to express very small gas concentrations in air. For CO₂ sensors, the ppm range tells you what levels the sensor can measure, such as normal indoor air through to poorly ventilated spaces.
SHT40: The SHT40 is a Sensirion digital temperature and humidity sensor. It reports ambient temperature and relative humidity, and those readings are sometimes used to compensate other measurements such as CO₂.
STCC4: STCC4 is a Sensirion gas-sensing chip that measures carbon dioxide (CO₂) concentration. Knowing which sensing chip a module uses helps you find compatible libraries, datasheets and performance specifications before using it in a project.
Thermal conductivity measurement: Thermal conductivity measurement estimates gas concentration by detecting how well the surrounding air conducts heat. For a CO₂ sensor, this tells you the module is using a direct physical sensing method rather than estimating CO₂ from other air-quality signals.