Description

The MQ-4 Methane Gas Sensor Module is a high-performance gas detection module designed to sense methane (CH₄) and natural gas concentrations in the air. It uses a SnO₂ (Tin Dioxide) semiconductor sensing element that changes resistance when methane is present, providing quick and accurate readings.

The sensor is ideal for home safety systems, gas leak detectors, biogas monitoring, and Arduino-based IoT projects. It features both analog (AO) and digital (DO) outputs for flexible interfacing with Arduino, ESP32, Raspberry Pi, and other microcontrollers.

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Specifications:

• Model: MQ-4 Gas Sensor Module
• Detected Gases: Methane (CH₄), Natural Gas, Biogas
• Operating Voltage: 5V DC
• Load Resistance: Adjustable via onboard potentiometer
• Output Type: Analog (AO) and Digital (DO)
• Concentration Detection Range: 200 ppm – 10,000 ppm
• Preheat Time: 20 seconds (typical)
• Sensing Element: SnO₂ semiconductor
• Operating Temperature: -10°C to +50°C
• Sensitivity: High to CH₄ and natural gas, low to alcohol and smoke
• Indicator LEDs: Power and digital output status
• Mounting: Compact PCB with screw holes for easy installation

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Uses / Applications:

• Methane gas leakage detection systems
• Home and industrial gas safety alarms
• Natural gas and biogas monitoring
• IoT and Arduino-based smart safety devices
• Educational and STEM projects on gas sensing

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Why Choose It:

• Reliable and accurate methane detection
• Dual output (analog and digital) for flexible use
• Adjustable sensitivity for different environments
• Compatible with Arduino, ESP8266, ESP32, and Raspberry Pi
• Cost-effective solution for gas safety and automation projects