MQ2 Gas Sensor Module – Smoke, Methane, Butane & LPG Detector for Arduino & Smart Home in Pakistan

Overview 

The MQ2 Gas Sensor Module is an analog and digital output sensor designed to sense concentrations of combustible gases in the air. It utilizes a SnO2 (Tin Dioxide) sensitive layer that changes its resistance when it comes into contact with specific gases. It is particularly sensitive to LPG (Liquefied Petroleum Gas), Propane, Hydrogen, and Smoke, making it the ideal choice for fire and gas leak detection systems.

Key Features

• Wide Detection Range: Detects Smoke, LPG, Butane, Propane, Methane, Alcohol, and Hydrogen.

• Dual Output Mode:

  • Digital (D0): Sends a HIGH/LOW signal to trigger an alarm once a threshold is reached (Adjustable).

  • Analog (A0): Provides a varying voltage based on gas concentration—perfect for measuring “how much” gas is in the air.

• Adjustable Sensitivity: Fine-tune the detection point using the onboard blue potentiometer.

• Fast Response: High-speed detection ensures your alarm triggers the moment gas is present.

• Long Life: Durable sensor element designed for consistent performance over time.

Technical Specifications