Project 21 · Sensor Catalog (Vol III)

MQ-2 Combustible Gas Sensor

Build a smart safety sniffer that detects smoke, LPG, and combustible gases in real-time.

Easy 30 min 5 components
MQ-2 Combustible Gas Sensor wiring diagram

What you'll learn

  • Understand the difference between analog gas concentration mapping and digital threshold detection.
  • Learn the importance of 'pre-heating' or 'burn-in' cycles for chemical-based sensors.
  • Calibrate a hardware potentiometer to set a specific trigger point for gas alarms.

What's in the kit

  • Arduino UNO R3
  • MQ-2 Gas Sensor Module
  • Breadboard (Half Size)
  • Jumper Wires (Male to Male)×4
  • USB Cable (Types A to B)

Protocol: analog