MQ-2 Gas & Smoke Sensor Module for Arduino (LPG, Methane, CO)

The MQ-2 is a versatile gas sensor that detects a wide range of flammable gases and smoke, making it perfect for gas-leak detectors and fire-safety projects. It senses LPG, propane, methane, hydrogen, and smoke, giving both analog and digital output for easy use.

Connect it to an Arduino, ESP32, or Raspberry Pi to build home safety alarms, gas-leak monitors, and IoT alert systems.

Key features:

• Detects LPG, propane, methane, hydrogen, alcohol and smoke
• Both analog and digital output with adjustable sensitivity
• On-board potentiometer to set the detection threshold
• Fast response and high sensitivity for reliable alerts
• Operating voltage 5V — simple 4-pin connection