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The MQ-02 Smoke & Gas Sensor is a reliable module designed to detect smoke and a variety of flammable gases such as LPG, butane, propane, methane, and hydrogen. It provides an analog output that changes with the concentration of gas in the air, making it perfect for Arduino, ESP32, Raspberry Pi, and IoT-based safety systems.

This sensor is widely used in gas leakage alarms, smoke detectors, and home automation projects. It features a sensitive coil and operates on low voltage, making it safe for DIY electronics and embedded applications.

Key Features:

Sensor: MQ-02

Detects: Smoke, LPG, propane, methane, hydrogen, and other flammable gases

Operating Voltage: 5V

Output: Analog (AO)

Fast response and high sensitivity

Easy to interface with Arduino, ESP32, Raspberry Pi, etc.

Long life and low cost

Ideal for gas leakage detection, air quality monitoring, smart homes