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Gravity: STCC4 CO2 Sensor

SKU: SEN0678

The Gravity STCC4 CO2 Sensor utilizes the Sensirion STCC4 chip to provide direct CO2 measurements based on thermal conductivity principles. Unlike other sensors that estimate eCO2, this approach significantly enhances measurement reliability. It includes an onboard Sensirion SHT40 temperature and humidity sensor for compensation, allowing for simultaneous temperature, humidity, and CO2 readings. This compact sensor is ideal for projects with limited space and environmental monitoring applications. Key features include direct CO2 measurement, onboard temperature and humidity compensation, and selectable I2C address options. The sensor has a perforated PCB to prevent heat interference from adjacent components, ensuring accurate thermal conductivity measurements. Specifications include a supply voltage range of 3.3–5 V, a measurement range of 400–5000 ppm, and an accuracy of ±100 ppm ±10% m.v. within the specified range. The response time is 20 seconds. The pinout includes VCC, GND, SCL, SDA, and options for I2C address selection and enabling/disabling temperature/humidity compensation. This sensor is a versatile choice for various applications, ensuring reliable performance in compact settings.

Downloadable Resources

  • Docs
  • Tech Specs

    • 1. Getting Started with Gravity: STCC4 CO2 Sensor

    The CO₂ sensor utilizes the Sensirion STCC4 chip for direct and accurate CO₂ measurement, offering temperature and humidity compensation via the SHT40 sensor. Ideal for compact spaces and environmental monitoring, this sensor provides reliable data by preventing heat interference. Note: Avoid damaging the yellow membrane on the chip.

    2. Example Code for STCC4 Continuous Measurement on Arduino UNO

    Explore continuous CO2 measurement using Gravity STCC4 with Arduino UNO. This guide covers hardware setup, software requirements, and example code for reading sensor data via the I2C interface. The setup outputs CO2, temperature, and humidity data to the serial monitor. Follow the tutorial for a seamless project experience. Ideal for learning environmental sensing and data acquisition.

    3. Example Code for STCC4 Calibration on Arduino UNO

    This tutorial provides a comprehensive guide on calibrating the Gravity STCC4 CO2 Sensor using Arduino UNO. It includes hardware setup, software installation, and a detailed example code for sensor calibration. Users learn to perform calibration with known CO2 concentration, set temperature, humidity, and pressure compensation, and obtain accurate environmental measurements. This guide enhances understanding of sensor functionality and data acquisition.

    Specifications

    • Supply voltage: 3.3–5 V
    • Operating temperature: 10~40℃
    • Operating humidity: 20~80%R.H
    • Operating current: 4.2mA@peak; 950μA@Continuous measurement; 100μA@Single shot measurement mode(10 s sampling interal)
    • Measurement range: 400–5000 ppm
    • Accuracy: ±100 ppm ±10% m.v. (within 400–5000 ppm)
    • Response time: 20 s

    Pinout

    Pin Description
    VCC Power supply, 3.3–5 V DC input
    GND Ground
    SCL I2C clock line (direct to onboard STCC4)
    SDA I2C data line (direct to onboard STCC4)
    0x64/0x65 jumper Sensor I2C address selection; takes effect after power cycle
    Enable/Disable Enable/Disable the onboard SHT40 temperature/humidity compensation; takes effect after power cycle

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