Detect Flammable Gas & Smoke with the MQ-2 Sensor Module

Build your next safety or environmental monitoring project with the reliable MQ-2 Gas Sensor Module. Ideal for Arduino, Raspberry Pi, and other microcontroller projects, this sensor is perfect for detecting home gas leaks, building an industrial combustible gas detector, or adding smoke detection to your DIY creations.

It features high sensitivity to a wide range of gases and provides both analog and digital outputs for maximum flexibility.

Key Features:

• Wide Detection Range: Highly sensitive to LPG, Butane, Propane, Methane, Hydrogen, and Smoke.
• Dual Output Interface:
  • AO (Analog Output): Provides a real-time voltage signal that increases with gas concentration. Perfect for measuring precise levels.
  • DO (Digital Output): Provides a simple HIGH/LOW signal when the gas concentration exceeds a preset threshold.
• Adjustable Sensitivity: An onboard potentiometer allows you to easily fine-tune the digital (DO) output's trigger point.
• Clear Indicators: Equipped with a power LED and a digital output indicator LED that lights up when the trigger threshold is reached.
• Stable & Reliable: Built with a high-quality dual-panel design for a long service life and rapid response/recovery characteristics.
• Easy to Install: Features four 3mm mounting holes for easy positioning in your project.

How to Use:

Simply power the module with 5V. After a brief 20-second warm-up period, the sensor will stabilize. Read the analog (AO) pin for a variable gas concentration reading, or use the digital (DO) pin for a simple alert when gas is detected above your set limit.

Specifications:

• Model: MQ-2
• Input Voltage: DC 5V
• Power Consumption: 150mA
• Outputs: 1x Analog (AO), 1x Digital (DO TTL)
• Dimensions: 32mm x 22mm x 27mm
• Analog Output (Clean Air): 0.1V - 0.3V
• Analog Output (High Concentration): Approx. 4V

Pinout:

• VCC: 5V Positive Power Supply
• GND: Ground
• DO: Digital TTL Signal Output
• AO: Analog Signal Output

Package Includes:

• 1 x MQ-2 Gas Sensor Module