MQ-2 Gas Sensor Module - LPG, Smoke, Propane, Hydrogen Detector

MQ-2 Smart Gas Leak Detector Module - LPG, Propane, Hydrogen, Smoke Sensor for Arduino & DIY Projects

Product Overview

Introducing the MQ-2 Gas Sensor Module from Bigyan Project (বিজ্ঞান প্রজেক্ট), your ultimate solution for detecting combustible gases like LPG, propane, hydrogen, butane, methane, and smoke. This high-sensitivity sensor module is perfect for home safety, industrial monitoring, and STEM education projects. With dual digital (TTL) and analog (0-5V) outputs, it seamlessly integrates with Arduino, Raspberry Pi, and other microcontrollers. Whether you're a hobbyist, engineer, or educator, this module offers reliable performance at an affordable price.

Technical Specifications

Why Choose Our MQ-2 Module? Key Features:

• 🔍 Multi-Gas Detection: Identifies LPG, propane, hydrogen, butane, methane, alcohol, and smoke.
• 📊 Dual Output Modes: Digital pin for threshold alarms + Analog pin for precise PPM measurement.
• 🎚️ Adjustable Sensitivity: Onboard potentiometer to fine-tune detection levels.
• ⚡ Fast Response: Detects gas leaks within 10 seconds for quick alerts.
• 🛠️ Plug-and-Play: Works with Arduino (Uno/Nano), ESP8266, Raspberry Pi (with ADC).
• 📦 Ready-to-Use: Pre-soldered pins, includes power LED and output indicator.

Practical Applications

From Bigyan Project to your workspace, this sensor is ideal for:

• 🏡 Home Safety: Detect LPG leaks from kitchen cylinders with audible alarms.
• 🏭 Industrial Safety: Monitor propane/butane levels in welding shops.
• 🔬 STEM Education: Teach gas detection concepts in school/college projects.
• 🚗 Automotive: Hydrogen leak detection in fuel cell vehicles.
• 🌫️ Air Quality: Smoke detection in IoT environmental monitors.

Step-by-Step User Guide

1. Initial Calibration: Power the module for 24 hours in clean air for optimal performance.
2. Wiring:
   • VCC → 5V (Arduino/RPi)
   • GND → Ground
   • DO → Digital Pin (for alarms)
   • AO → Analog Pin (for PPM reading)
3. Threshold Setting: Rotate the potentiometer until the DO LED turns off in clean air.
4. Testing: Introduce gas (e.g., lighter fluid vapor) – DO LED should light up.

Frequently Asked Questions (FAQs)

• Q: How accurate is PPM measurement?
  A: ±15% accuracy (calibration recommended for precise readings).
• Q: Can it detect natural gas (methane)?
  A: Yes, but sensitivity is 30% lower vs. LPG.
• Q: Why does it need 24-hour preheat?
  A: Initial burn-in stabilizes the sensor for long-term reliability.
• Q: Is it waterproof?
  A: No – avoid high-humidity environments.

Important Considerations

• ⚠️ Cross-Sensitivity: May trigger with alcohol vapor or cigarette smoke.
• ⚠️ Lifespan: 1-3 years depending on usage (replace if response slows).
• ⚠️ Temperature Effects: Requires recalibration in extreme cold/heat.

Compatible With

• All Arduino Boards (Uno, Mega, Nano)
• Raspberry Pi (via MCP3008 ADC)
• ESP8266/ESP32 (WiFi-enabled projects)
• STM32 & PIC Microcontrollers

Upgrade Possibilities

• 🌐 IoT Integration: Add ESP8266 for cloud alerts (Blynk/ThingSpeak).
• 🔊 Audio Alerts: Connect a buzzer for loud alarms.
• 📈 Data Logging: Use SD card module to record gas levels.

Why Buy From Bigyan Project?

• ✅ Tested Quality: Each module is pre-tested before shipping.
• ✅ Beginner Support: Free Arduino code samples provided.
• ✅ Local Availability: Fast delivery across Bangladesh.

Final Thoughts

The MQ-2 Gas Sensor Module from Bigyan Project (বিজ্ঞান প্রজেক্ট) is a must-have for anyone serious about gas detection and safety. With its proven reliability, easy integration, and multi-gas detection capabilities, it outperforms competitors in its price range. Order yours today and build smarter safety systems with confidence!

Pro Tip: Pair this with our Arduino Starter Kit for a complete learning experience!