Gas Sensor Calibration

Introduction

This experiment shows how to calibrate a gas sensor for detecting gases like CO, methane, and others.

Components Needed

• MQ Series Gas Sensor
• Arduino
• Jumper Wires
• Calibration Gases

Circuit Setup

1. Connect the MQ sensor to the Arduino, ensuring the analog output is connected to an analog input pin.

Code for Gas Sensor Calibration

Upload the following code to your Arduino to calibrate the gas sensor:

const int gasSensorPin = A0;
int gasLevel;

void setup() {
  Serial.begin(9600);
}

void loop() {
  gasLevel = analogRead(gasSensorPin);
  Serial.print("Gas Level: ");
  Serial.println(gasLevel);
  delay(2000);
}
            

Explanation

The gas sensor detects the level of gases in the air. Calibration is done by measuring the sensor's response to known concentrations of gases.

Troubleshooting

• If the sensor readings are incorrect, check the sensor's calibration and the wiring.
• Ensure you are using the correct calibration gas concentrations for your sensor type.