Combustible Gas Sensor

Description

What it is

The MQ-136 sensor is a tool for measuring the concentration of flammable gases in the air. It can be used in electronic and prototyping projects to detect the presence of hazardous gases in domestic or industrial environments.

Features

• Type: Semiconductor Sensor
• Detected Gases: Flammable
• SKU: ARD009127
• Price: 27.48 €

What it is for

The MQ-136 is ideal for building domestic or industrial gas warning systems. It can be integrated with an Arduino or an ESP to create an alarm that emits an acoustic signal when the gas concentration exceeds a certain limit. Other uses include measuring air quality in enclosed environments.

Tutorial: How to Use MQ-136

The MQ-136 sensor measures the concentration of flammable gases in the air, ideal for domestic or industrial safety projects.

What you need

• MQ-136
• Arduino
• 10 kΩ Resistor
• Power Supply Cable

Steps

1. 1. Connect the resistor (10 kΩ) to the VCC pin of the MQ-136 sensor.
2. 2. Connect the GND pin of the sensor to the GND of your Arduino.
3. 3. Connect the SIG pin of the sensor to pin A0 of Arduino.
4. 4. Power the sensor with 5V from Arduino.
5. 5. Load the following code onto your Arduino.
6. 6. Check if the sensor responds correctly to various levels of gas.
7. 7. Refer to the datasheet for further details.
8. 8. Try measuring the gas concentration in a domestic environment.

Example code

```
#include <Wire.h>

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

void loop() {
  int sensorValue = analogRead(A0);
  float voltage = sensorValue * (5.0 / 1023.0);
  Serial.println(voltage);
  delay(1000);
}
```

Mini project

Build a domestic gas warning system using the MQ-136 and an Arduino. In 30 minutes, you can mount an alarm that emits a sound when the gas concentration exceeds a certain limit.

Common mistakes

• Do not connect the sensor directly to 5V without a resistor.
• Forget to verify the code with the datasheet.
• Connect the sensor to the wrong GND.
• Do not test the sensor in a controlled environment before using it.

Recommended accessories

• Arduino Uno
• 5V Power Supply
• Power supply cable for Arduino
• Audio alarm microphone

Frequently asked questions

Which gases can the MQ-136 measure?
The MQ-136 is designed to measure the concentration of flammable gases.

How long does it take to calibrate the MQ-136?
Calibrate the sensor in a stable environment before use.

Can the MQ-136 work with 3.3V?
Check the datasheet for further details.

What should I do if the sensor does not respond?
Check the connections and verify that the power supply is correct.