MQ-4 Natural Gas Sensor Module For Methane(CNG) gas Detector Module
MQ-4 Natural Gas Sensor Module (Methane / CNG)
Popular MQ-4 Sensor Options
MQ-4 Methane Gas Sensor Module
Description: NonePrice: 120URL:Number of Reviews: 18Rating: 4.6Featured Tag:Merchants: Robocraze + others
MQ4 Gas Sensor for CNG Detection
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MQ-4 Natural Gas Detector Module
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MQ-4 Gas Sensor Breakout Board
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Methane CNG Gas Sensor MQ4
Description: NonePrice: 110URL:Number of Reviews: NoneRating: NoneFeatured Tag:Merchants: Amazon.in
r Module is designed to detect methane (CH) and natural gas (CNG).
Commonly used in:
Home gas leak detection
Industrial safety systems
CNG vehicle monitoring
IoT gas detection projects
Working Principle
Uses SnO (Tin Dioxide) sensing material
In clean air low conductivity
In presence of methane conductivity increases
The sensor converts this change into analog voltage output
Similar working principle as other MQ-series sensors
Infographic Summary
p>(CH) Voltage: 5V Range: 30010,000 ppm Output: Analog + Digital Type: Combustible Gas Response: Fast
Pin Configuration
MQ-4 Module VCC 5V GND Grired)
Operating Temperature: -10C to 50C
Key Features
High sensitivity to methane gas
Fast response and recovery
Easy to interface with Arduino/ESP32
Low-cost sensor module
Adjustable sensitivity (potentiometer)
Applications
Domestic gas leakage alarm
CNG vehicle safety system
Industrial gas monitoring
IoT gas detection systems
Alarm systems with buzzer
Interfacing
Compatible with:
Arduino
ESP32 / ESP8266
Raspberry Pi
Use:
AO measu hours) for stable readings
Not highly selective (may respond to other gases slightly)
High power consumption due to heater
Not for precise ppm measurement
Real-world insight:
MQ sensors are better for detection (presence) than exact measurement
MQ-4 vs MQ-6
Feature | MQ-4 | MQ-6 |
Best For | Methane (CNG) | LPG, Butane |
Gas Type | Natural gas | Cooking gas |
Use Case | Vehicles, pipelines | Homes, kitchens |
Pro Tip
For a smart gas leak alarm:
MQ-4 + Buzzer + LED + Microc