⚠️ DIY Gas Leak Detector Using MQ Gas Sensor and Arduino – Perfect for Home Safety Projects

-

Gas leaks can be deadly, and early detection is crucial. In this blog, we’ll build a gas leak detection system using Arduino and an MQ series gas sensor. Whether you want to monitor LPG, methane, smoke, or carbon monoxide, this project gives you a powerful yet simple solution for smart home automation and IoT.

🧰 Components Required

  • ✅ Arduino Uno or Nano

  • ✅ MQ-2 / MQ-3 / MQ-4 / MQ-5 / MQ-7 / MQ-135 gas sensor

  • ✅ Jumper wires

  • ✅ Breadboard

  • ✅ (Optional) Buzzer or LED for alerts

  • ✅ Android phone with Plysmotix app for monitoring

🛒 Buy high-quality sensors and kits from Plysmotix.in — Trusted by makers across India!

📲 Download the Plysmotix Android App

Level up your electronics experience:

✅ Access live tutorials & projects
✅ Bluetooth control & sensor reading
✅ Shop components on-the-go
✅ Get alerts and project ideas weekly

🎯 Download Now and unlock smarter DIY electronics!

🔌 Circuit Diagram (MQ Gas Sensor to Arduino)

MQ Sensor PinArduino
VCC5V
GNDGND
AOUTA0

💡 DOUT can also be used for digital threshold-based triggers, but for better accuracy, we use analog readings via A0.

💻 Arduino Code for Gas Detection System

Arduino_Basic_Code_Gas_Sensor_MQ_Series
int gasPin = A0;

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

void loop() {
  int gasValue = analogRead(gasPin);
  Serial.print("Gas Level: ");
  Serial.println(gasValue);

  if (gasValue > 600) { // Adjust threshold based on calibration
    Serial.println("Warning! High Gas Level Detected!");
  }

  delay(1000);
}

📈 How the Code Works

  • analogRead(gasPin) reads gas concentration from 0 to 1023.

  • When the reading exceeds 600 (you can calibrate this based on your environment), it prints a warning alert.

  • You can connect a buzzer or relay for real-world automation (turning off gas lines or activating alarms).

🔐 Real-World Applications

  • 🏠 Home gas leak alert system

  • 🏭 Industrial gas detection (CO, CH4, Alcohol, Smoke)

  • 🚘 Automobile gas or air quality monitor

  • 🧪 Lab safety monitoring system

  • 🌳 Air quality control and automation

🛍️ Buy MQ Sensors & Kits from Plysmotix.in

We offer a full range of MQ gas sensors, including:

  • 🔥 MQ-2 – LPG, Smoke, Methane

  • 💨 MQ-135 – Air quality and CO2

  • 🍺 MQ-3 – Alcohol detection

  • ⚗️ MQ-7 – Carbon Monoxide

  • 🛡️ MQ-5 – Hydrogen & Natural gas

🎯 Shop now at Plysmotix.in – Fast delivery and unbeatable prices.

📲 Plysmotix Android App – Monitor Gas Levels Remotely

Control and monitor your gas detection projects via Bluetooth with our Android app:

  • 📊 View live gas readings on your phone

  • 🔔 Get vibration or notification alerts

  • 🧠 Save logs for future reference

  • 🛍️ Order replacement parts directly

🎯 Download the Plysmotix Android App

🚀 SEO Keywords to Help This Blog Rank

  • Arduino gas sensor project

  • MQ-2 sensor with Arduino code

  • DIY LPG leak detector Arduino

  • Home gas detector using MQ series

  • Buy MQ gas sensor India online

  • Plysmotix Arduino gas leak kit

  • Arduino air quality monitor

  • Download Plysmotix Android app

✅ Conclusion

Gas detection is not just for professionals—anyone can now create an affordable smart gas sensor system using Arduino and MQ sensors. With simple code and affordable parts, you can protect lives and property.

🎯 Start your project today with parts from Plysmotix.in
📲 Make it smarter with the Plysmotix Android App

Comments

Post a Comment

Popular posts from this blog

💡How to Blink an LED with Arduino – Beginner's Guide with Code

-
Are you just getting started with Arduino and electronics?   One of the most iconic and simple projects you can begin with is blinking an LED. This project is perfect for beginners who want to understand how to use digital pins and get comfortable with writing basic Arduino code. In this tutorial, we’ll show you how to blink an LED using an Arduino board in just a few minutes. You'll also find the exact code and a step-by-step explanation of how it works. 🚀 What You Need Before diving into the code, make sure you have the following components: ✅ Arduino Uno (or any other Arduino-compatible board) ✅ LED (any color) ✅ 220-ohm resistor ✅ Breadboard & jumper wires ✅ USB cable to connect Arduino to your computer 👉 Pro Tip : You can grab an Arduino Starter Kit from Plysmotix that includes all these components and more for future projects. 🔌 Circuit Diagram Connect your components as follows: The longer leg (anode) of the LED goes to digital pin 13 vi...
Read more

☢🌫 How to Control Fan Speed with Arduino Using PWM and a Potentiometer

-
Controlling the speed of a fan using Arduino is a great way to learn about PWM (Pulse Width Modulation) and analog input. This project is simple, powerful, and forms the basis of temperature control systems , ventilation , robot cooling , and more. Whether you're building a DIY smart home setup or a robot with cooling , this tutorial will teach you how to adjust fan speed in real-time using a potentiometer . 🔧 Components Required ✅ Arduino Uno (or compatible board) ✅ DC Fan (5V or 12V based on setup) ✅ Potentiometer (10kΩ) ✅ NPN Transistor (e.g., TIP120 or 2N2222) (optional for higher power fans) ✅ Diode (1N4007 for back EMF protection) (optional) ✅ Jumper wires & Breadboard 🛒 Buy all components from Plysmotix.in – Fast shipping across India! 📲 Bonus: Download the Plysmotix Android App Want circuit diagrams, live tutorials, and mobile Bluetooth control? 🎯 Download the Plysmotix App and: Get interactive guides Shop components directly fr...
Read more

🔊 How to Make a Buzzer Beep with Arduino – Easy Sound Project for Beginners

-
 Are you diving into the world of electronics and wondering how to make a buzzer beep using Arduino ? You’re in the right place! In this quick tutorial, we’ll show you how to connect and control a piezo buzzer with Arduino using just a few lines of code. Whether you're creating an alarm system , timer , or just learning the basics, this is the perfect starter project. 📦 What You’ll Need To get started, grab these components: ✅ Arduino Uno (or compatible board) ✅ Piezo buzzer (active type) ✅ Jumper wires ✅ Breadboard (optional) 👉 Get all the components in one place at Plysmotix.in – Your One-Stop Robotics & Electronics Store . We offer affordable kits, high-quality sensors, and fast shipping across India! 💡 What Is a Buzzer? A buzzer is an electronic component that makes sound when powered. It’s often used in: 🚨 Security alarms ⏱️ Timers 🔊 Notifications & alerts For this project, we’re using an active buzzer (it beeps when voltage is...
Read more