MQ-4 Natural Gas Sensor Module For Methane(CNG) gas Detector Module
π₯ MQ-4 Natural Gas Sensor Module (Methane / CNG)
π Popular MQ-4 Sensor Options
MQ-4 Methane Gas Sensor Module
Description: None
Price: βΉ120
URL:
Number of Reviews: 18
Rating: 4.6
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Merchants: Robocraze + othersMQ4 Gas Sensor for CNG Detection
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Rating: 4.5
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Merchants: Quartz ComponentsMQ-4 Natural Gas Detector Module
Description: None
Price: βΉ135
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Merchants: electronicscomp.com + othersMQ-4 Gas Sensor Breakout Board
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Merchants: Robu.inMethane CNG Gas Sensor MQ4
Description: None
Price: βΉ110
URL:
Number of Reviews: None
Rating: None
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Merchants: Amazon.inπ Overview
The MQ-4 Gas Sensor Module is designed to detect methane (CHβ) and natural gas (CNG).
π Commonly used in:
π Home gas leak detection
π Industrial safety systems
π CNG vehicle monitoring
π€ IoT gas detection projects
π§ Working Principle
Uses SnOβ (Tin Dioxide) sensing material
In clean air β low conductivity
In presence of methane β conductivity increases
π The sensor converts this change into analog voltage output
β Similar working principle as other MQ-series sensors
π Infographic Summary
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β π₯ MQ-4 GAS SENSOR β
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β π― Detects: Methane (CHβ) β
β β‘ Voltage: 5V β
β π Range: 300β10,000 ppm β
β π Output: Analog + Digital β
β π₯ Type: Combustible Gas β
β β± Response: Fast β
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π Pin Configuration
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β MQ-4 Module β
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β VCC β 5V
β GND β Ground
β AO β Analog
β DO β Digital
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βοΈ Key Specifications
β‘ Operating Voltage: 5V DC
π Detection Range: 300 β 10,000 ppm
π Output:
Analog (gas concentration level)
Digital (threshold detection)
π₯ Sensitive Gas: Methane (CHβ), Natural Gas
π Current Consumption: ~150 mA (heater required)
π‘ Operating Temperature: -10Β°C to 50Β°C
π Key Features
π₯ High sensitivity to methane gas
β‘ Fast response and recovery
π§ Easy to interface with Arduino/ESP32
π° Low-cost sensor module
π Adjustable sensitivity (potentiometer)
π§ͺ Applications
π Domestic gas leakage alarm
π CNG vehicle safety system
π Industrial gas monitoring
π€ IoT gas detection systems
π Alarm systems with buzzer
π Interfacing
Compatible with:
π΅ Arduino
π‘ ESP32 / ESP8266
π Raspberry Pi
π Use:
AO β measure gas concentration
DO β trigger alarm
β οΈ Important Notes
β³ Requires preheating (24β48 hours) for stable readings
β οΈ Not highly selective (may respond to other gases slightly)
β οΈ High power consumption due to heater
β οΈ Not for precise ppm measurement
π¬ Real-world insight:
MQ sensors are better for detection (presence) than exact measurement
π 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 |
π‘ Pro Tip
For a smart gas leak alarm:
MQ-4 + Buzzer π + LED π‘ + Microcontroller
π Detect methane leaks and alert instantly
