Description
The MQ-4 Methane Sensor is a high-sensitivity gas sensor module capable of detecting methane and natural gas concentrations in the air. It features an onboard analog and digital output, allowing easy integration with microcontrollers like Arduino, ESP32, and Raspberry Pi. The sensor includes a potentiometer for threshold adjustment and an onboard LED indicator for digital output. It is widely used in home safety systems, industrial gas leak detection, and DIY gas monitoring projects.
Key Features
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Detects methane (CH₄) and natural gas
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Analog and digital outputs
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Onboard potentiometer to adjust threshold
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Digital LED indicator for gas detection
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Compatible with Arduino, ESP32, Raspberry Pi
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Fast response and recovery time
Specifications
| Feature | Details |
|---|---|
| Operating Voltage | 5V DC |
| Detection Range | 200–10,000 ppm methane |
| Output | Analog voltage, Digital HIGH/LOW |
| Preheat Time | 24–48 hours (first use) |
| Current Consumption | ≤150 mA |
| Operating Temperature | -10°C to 50°C |
| Dimensions | 32 × 20 × 18 mm |
Applications
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Gas leakage detection in homes and industries
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Smart home safety systems
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Environmental monitoring
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DIY gas detector projects
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IoT-based gas monitoring systems
Compatible Boards / Circuits
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Arduino (Uno, Nano, Mega)
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ESP32 / ESP8266
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Raspberry Pi (via ADC for analog output)
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Can interface with relays, alarms, and displays for alert systems
Reviews
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