Description
The MQ-2 Gas Sensor is a popular smoke and combustible gas detector widely used in DIY electronics, home safety alarms, and industrial monitoring systems.
It features a sensitive MQ-series gas-sensing material capable of detecting a wide range of flammable gases, including LPG, propane, methane, hydrogen, and smoke particles.
The module provides both analog and digital outputs, allowing easy integration with Arduino, ESP32, and Raspberry Pi. Its onboard potentiometer allows threshold adjustment for digital triggering, and the built-in LED indicates when gas concentration exceeds the set value.
With fast response and long life, the MQ-2 is ideal for fire detection, gas monitoring, and IoT safety applications.
Key Features
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Detects smoke, LPG, propane, methane, and hydrogen
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High sensitivity to combustible gases
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Fast response and recovery
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Analog and digital output modes
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Adjustable sensitivity (potentiometer)
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Built-in LED indicator for gas alerts
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Compatible with Arduino, ESP32, Raspberry Pi
Specifications
| Feature | Details |
|---|---|
| Operating Voltage | 5V DC |
| Detection Range | 300–10,000 ppm |
| Gases Detected | Smoke, LPG, Propane, Hydrogen, Methane |
| Output | Analog voltage, Digital HIGH/LOW |
| Preheat Time | 24–48 hours (initial use) |
| Current Consumption | ≤150 mA |
| Operating Temperature | -10°C to 50°C |
| Dimensions | 32 × 20 × 22 mm |
Applications
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Smoke detection and fire alarms
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LPG leakage detection
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Kitchen and home safety monitoring
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Industrial gas detection
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IoT-based gas/smoke detector systems
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Smart home safety devices
Compatible Boards / Circuits
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Arduino (Uno, Nano, Mega)
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ESP32 / ESP8266
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Raspberry Pi (with ADC module)
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Alarm systems, relay modules, and safety sirens
Reviews
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