DFRobot Gravity: MEMS Gas Sensor (CO, Alcohol, NO2 & NH3) – I2C – MiCS-4514

SKU: rz24318246
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  1. Operating Voltage: 3.3~5.5V DC
  2. Power Dissipation: 0.45W(5V)
  3. Output Signal: I2C (0~3V)
  4. Working Temperature: -30~85℃
  5. Working Humidity: 5~95% RH(No condensation)
  6. Storage Temperature: -40~85℃
  7. Lifespan: >2 years (in the air)
  8. Circuit Board Size: 27mm* 37mm
  9. Mounting Hole Size: inner diameter 3.1mm/ outer diameter 6mm
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DFrobot offers an advanced level of sensors at an affordable cost than any other competitor brand in the market, making them ideal for the one who wants to start some Projects through Different types of sensors.

After finding Different types of sensors on market, we at robozar. in have determined that DFrobot is one of the good brands that offer a wide range of sensors at an Appropriate price.

DFRobot offers a 3.3/5V compatible MEMS gas concentration sensor. This sensor can detect a variety of gas concentrations, including CO, C2H5OH (alcohol), H2, NO2, and NH3, and the code includes various gas concentration conversion formulas to make sensor testing and use easier. It’s compatible with Arduino, ESP32, Raspberry Pi, and other mainstream controllers thanks to its I2C output and 3.35.5V wide voltage input.

Board Overview:

DFRobot Gravity: MEMS Gas Sensor (CO

  1. Gas leak detection
  2. Gas safety equipment
  3. Air environment detection


  1. Support detection of a variety of harmful gas
  2. Integrate the calculation formulas of various gas concentration
  3. Low power consumption
  4. I2C digital output
  5. Compatible with the 3.3~5.5V master controller

Useful Links:

Please visit the DFrobot wiki page for more information about this product. Any suggestions for improvement, such as correcting errors, adding more demo codes or tutorials, will be highly appreciated.

Package Includes:

1 x Gravity: MEMS CO, Alcohol, NO2 & NH3 Gas Sensor

1 x Gravity-4pin I2C Cable

Additional information



Operating Voltage(V)


Power Consumption (Watt)


Communication Interface


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)

Operating Temperature Range (°C)


Opt. Relative Humidity(RH)


Mounting Holes Diameter (mm)

ID:3.1, OD:6

Dimensions in mm (LxWxH)


Weight (gm)