MQ2 Gas Sensor Module – Smoke, LPG, and Methane Detection for Arduino and IoT Projects
The MQ2 Gas Sensor Module is a highly sensitive detector for a wide range of gases including LPG, propane, methane, hydrogen, smoke, and alcohol. Perfect for gas leak detection systems, fire safety, and air quality monitoring, it’s fully compatible with Arduino, Raspberry Pi, ESP32, and other microcontroller platforms.
 
Key Features:
Multi-Gas Detection
Detects LPG, methane, propane, hydrogen, smoke, and more.
Dual Output
Provides both analog (variable gas level) and digital (threshold-based) outputs for flexible integration.
Adjustable Sensitivity
Onboard potentiometer allows fine-tuning of the digital output threshold.
Onboard Indicator LEDs
Power and signal LEDs for easy visual status monitoring during operation.
Ready-to-Use Module
Pre-mounted sensor with 4-pin interface—ideal for plug-and-play with development boards.
 
Applications:
Home and industrial gas leak detectors
Fire safety and smoke alarms
Air quality monitors
IoT-based environmental sensing
Smart kitchen or gas appliance safety
 
Package Includes:
1 × MQ2 Gas Sensor Module
 
Specifications:
Sensor Type: MQ2
Detected Gases: LPG, methane, propane, hydrogen, smoke, alcohol
Operating Voltage: 5V DC
Analog Output: Voltage proportional to gas concentration
Digital Output: HIGH/LOW signal based on threshold
Sensitivity Adjustment: Via onboard potentiometer
Preheat Time: ~20 seconds for stable readings
 
Dimensions:
Length: 32 mm
Width: 20 mm
Height: 18 mm
 
Weight: 5 g
 
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