Gravity: MICS-4514 MEMS Gas Concentration Detection Sensor

SKU: SEN0377

This MEMS gas concentration sensor supports 3.3 V / 5 V systems and can detect multiple gases, including CO, C₂H₅OH (alcohol), H₂, NO₂, and NH₃. The onboard processing integrates gas-specific conversion formulas, allowing direct output of concentration values without complex calibration. With I²C communication and a wide 3.3–5.5 V input range, the sensor is fully compatible with Arduino, ESP32, Raspberry Pi, and other mainstream controllers, making it suitable for environmental monitoring, air-quality assessment, and IoT applications.

Front of MEMS Gas Sensor module detecting CO and NH3-DFRobot product
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    Parameter Details
    Detection of Physical Quantities gas concentration of CO,C2H5OH(Alcohol), H2, NO2, NH3, CH4
    Operating Voltage 3.3~5.5V DC
    Power Dissipation 0.45W(5V)
    Output Signal I2C(0~3V)
    Measuring Range - 1 – 1000ppm(Carbon monoxide CO )
    - 0.05 – 10ppm(Nitrogen dioxide NO2 )
    - 10 – 500ppm( Ethanol C2H5OH )
    - 1 – 1000ppm(Hydrogen H2)
    - 1 – 500ppm(Ammonia NH3 )
    - >1000ppm(Methane CH4 )
    Working Temperature -30~85℃
    Working Humidity 5~95%RH (No condensation)
    Storage Temperature -40~85℃
    Lifespan >2 years (in the air)
    Circuit Board Size 27mm*37mm
    Mounting Hole Size inner diameter 3.1mm/outer diameter 6mm

    Pinout

    No. Name Functions
    1 SDA I2C data wire SDA
    2 SCL I2C clock line SCL
    3 GND negative pole of power supply
    4 VCC positive pole of power supply

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