About this item

🌫️ MQ-2 Gas and Smoke Sensor Module

The MQ-2 is a widely used gas and smoke sensor capable of detecting flammable gases and smoke.
It is commonly used in Arduino, ESP32, Raspberry Pi projects for gas leak detection and alarm systems.

🛡️ Features & Advantages

• 🌫️ Gas and smoke detection
• 🔥 Sensitive to LPG, propane, methane, hydrogen, alcohol
• 🔘 Analog and digital outputs
• 🔧 Adjustable detection threshold via potentiometer
• 🧰 Ready-to-use module with onboard electronics

📦 Technical Description

• 🧩 Sensor type: semiconductor (SnO₂)
• ⚡ Supply voltage: 5 V DC
• 🔘 Outputs:
  • AO: analog output (gas concentration level)
  • DO: digital output (adjustable threshold)
• 🔥 Detected gases: LPG, butane, propane, methane, hydrogen, smoke
• 📏 Preheating time: ≥ 20 s (optimal stabilization > 24 h)

🛠️ Applications

• 🚨 Gas and smoke detectors
• 🏠 Home safety systems
• 🤖 Arduino and ESP32 projects
• 🧪 Electronics experiments and education
• 💡 DIY alarm systems

⚠️ Usage Notes

• ❗ Sensor requires a preheating period
• 🔧 Calibrate sensitivity according to environment
• 🛡️ Not suitable as a certified safety detector
• ⚡ Relatively high power consumption due to heater

✨ Key Features

• 🌫️ Gas and smoke detection
• 🔘 Analog and digital outputs
• ⚡ 5 V power supply
• 🔧 Adjustable sensitivity
• 📦 Ideal for alarm and safety projects