MQ-4 Gas Methane (CNG) Detector Sensor Module
MQ-4 Methane Gas Sensor Module detects methane (CH₄), natural gas, and CNG with high sensitivity. Perfect for gas leak detection, safety alarms, and Arduino-based IoT monitoring projects.
| Parameter | Specification |
|---|---|
| Operating Voltage | 5 V DC |
| Detectable Gas | Methane (CH₄), Natural Gas, CNG |
| Output Type | Analog & Digital |
| Detection Range | 300 ppm – 10,000 ppm |
| Response Time | < 10 s |
| Preheat Time | 20 s |
| PCB Size | Approx. 32 mm × 22 mm |
OVERVIEW
The MQ-4 Gas Sensor Module is a high-performance gas detector designed to sense methane (CH₄), CNG, and natural gas concentrations in the air. It features a SnO₂ (tin dioxide) sensing layer that changes resistance when exposed to gas, producing both analog and digital outputs.
This module is widely used in home and industrial gas leak alarms, safety monitoring systems, and Arduino or ESP32-based IoT projects. Its onboard potentiometer allows easy sensitivity adjustment, making it simple to integrate into prototypes and production systems.
⚙️ Features
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Detects Methane (CH₄), Natural Gas, and CNG
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High sensitivity and quick response time
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Analog and digital output pins for versatile interfacing
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Adjustable sensitivity with onboard potentiometer
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Compatible with Arduino, NodeMCU, ESP32, and Raspberry Pi
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Compact, durable PCB design
📦 Applications
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Methane and CNG gas leak detectors
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Home and industrial safety systems
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Smart IoT gas monitoring projects
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Alarm systems and automation projects
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