Introduction
This experiment shows how to calibrate a gas sensor for detecting gases like CO, methane, and others.
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Components Needed
- MQ Series Gas Sensor
- Arduino
- Jumper Wires
- Calibration Gases
Circuit Setup
- Connect the MQ sensor to the Arduino, ensuring the analog output is connected to an analog input pin.
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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.