Sensor-Air Quality

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The product number of Sensor-Air is: MSDT61

Sensor-Air is an air quality sensor module.

TP401T air quality sensor shows great sensitivity towards alcohol, cigarettes, ammonia, sulfide and other pollution sources.

Introduction of Sensor Pins

Sensor backpin.png

Air Quality Sensor
General Pin Out Sensor / Trinket's Pin Out
PIN3 (SIGNAL-A) Analog Input
PIN4 (SIGNAL-B) Not Connected
  • General Pin Out is the standard pin out of a Sensor / Trinket connector.
  • Sensor / Trinket's Pin Out is this specific Sensor / Trinket's wiring in relation to the General Pin Out.
  • SIGNAL-A / SIGNAL-B are signals that could be digital input, digital output, analog input or analog output. Or special signals such as serial communication (SoftwareSerial, IIC (I2C), etc) or other special signals.
  • Not Connected refers to the Pin not being used for this particular Sensor / Trinket.
  • Read more about the hub module.


  • Show great sensitivity towards VOCS and odorous gas such as ammonia, alcohol, hydrogen sulfide, toluene and hydrogen.
  • Low consumption
  • Sensitive for air pollution.
  • long product life and low price
  • Easy to use


  • Sensor voltage
    • 3.3V~5V working voltage
  • Sensor size
    • Size of the board: 23.5mm*13mm
    • 1.27mm-spacing 4Pin interface connected to sensorhub
    • The CAD drawing of the sensor: File:Sensor
  • Technical parameters
    • Range: 1-100ppm
    • Sensitivity: 0.15-0.45ppm
  • Connection
    • This sensor can be connected to the following interface of core: A0~A7



Program Download


  • Follow the Software Getting Started Guide.
  • Select the Board, Processor and Port.
  • Click [File]->[Open], browse to the project program address, and click "Sensor-Air Quality Test.ino" to open the program.
  • After confirming all these items are correct, click "→" to download the program to the development board.

Hardware Setup

  • Referring to the following diagram, connect the Sensor-AirQulity to analog pin A0/A1 of Microduino-Sensorhub.

Microduino-sensorhub Moisture.JPG


  • After download, open the serial monitor.
  • The current air quality value will be printed out in cycle in the serial monitor.


Air cleaner, air conditioner and fresh air detector.





  • Front
  • Back
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