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Electronic Components
Gas Sensor (MQ)
Protect your environment with gas detection. MQ-series sensors are robust, reliable, and essential for air quality monitoring.
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Gas Sensor (MQ Series)
Detects the presence of specific gases in the atmosphere (Smoke, LPG, CO, etc.). The resistance of the internal heating element changes when target gas is present.
Key Applications
- Air quality monitors
- Gas leak alarms
- Industrial safety systems
Detection: Various gases (dependant on model) | Analog & Digital output🧪The Science Behind It
Gas sensors like the MQ-2 use a Metal Oxide Semiconductor (SnO2) layer. When the sensor is heated, it interacts with gas molecules in the air.
In clean air, the sensor has high resistance. When combustible gases are present, the gas molecules react with the oxygen on the SnO2 surface, releasing electrons and decreasing the resistance of the sensor.Chemi-resistance Principle
Requires a "Burn-in" period to heat the internal element.
Pin Configuration
VCC5V Power Supply (Heater requires 5V)
GNDGround Connection
AOAnalog Output (Voltage based on gas level)
DODigital Output (High/Low based on threshold)