Interfacing Gas Flow Sensor Module with Arduino

Gas Flow Sensor Module

A Gas Flow Sensor Module measures the rate of gas flowing through a system. These sensors are widely used in industrial, medical, and environmental monitoring applications. When connected to an Arduino, you can read real-time flow values and respond accordingly in your project.

Working Principle of Gas Flow Sensor

Most gas flow sensors work based on thermal or differential pressure principles. A heating element and temperature sensors detect how gas movement affects the heat distribution. This data is then converted into an electrical signal proportional to the flow rate, which the Arduino can process.

Types of Gas Flow Sensors

Thermal Mass Flow Sensor

  • Heated element warms the gas.
  • Sensors detect temperature changes.
  • Flow rate is calculated based on heat dispersion.

Differential Pressure Sensor

  • Gas passes through a narrowed path.
  • Pressure sensors read the difference.
  • Arduino converts the pressure change into flow rate.

Requirements

1. Arduino (Uno, Nano, etc.)

2. Gas Flow Sensor Module (e.g., YF-S201 or AWM series)

3. Jumper wires

4. Optional: Display module or IoT shield

Pin Configuration of Gas Flow Sensor Module

Gas Flow Sensor Module

  • VCC: Connect to +5V on Arduino.
  • GND: Connect to Arduino GND.
  • OUT: Analog or Digital signal pin to Arduino (e.g., A0).

Wiring the Gas Flow Sensor to Arduino

Connect the sensor’s VCC and GND to the respective Arduino power pins. Connect the output signal (OUT) to an analog input pin like A0. Ensure that the connections are secure and the tubing (if used) is properly sealed for accurate readings.

Algorithm

  1. Initialize Components

    • Wire the sensor to Arduino (VCC, GND, OUT).
    • Use analogRead() for sensors with analog output.

  2. Write the Code

    • Define sensor pin in code.
    • Read analog value from sensor.
    • Convert reading to flow rate using calibration data.

  3. Display or Use Data

    • Show flow rate on serial monitor or LCD.
    • Trigger actions when flow crosses thresholds.
    • Log data to SD card or send via IoT module.

  4. Test and Calibrate

    • Upload the code and start the flow.
    • Compare readings with known values.
    • Adjust conversion factor as needed.

Applications of Gas Flow Sensor Modules

  • Industrial gas monitoring systems
  • Oxygen flow in medical ventilators
  • Smart HVAC and air filtration systems
  • Environmental air quality monitoring
  • DIY gas leak and flow analysis setups

Conclusion

Integrating a Gas Flow Sensor Module with Arduino allows for accurate and responsive gas flow monitoring. Whether you’re working on an environmental project or building smart automation, this module offers reliable flow measurement to enhance your design.