🌫️ MQ-135 Air Quality Sensor – Gas Sensor Module for CO2, NH3, Benzene, Smoke
The MQ-135 Gas Sensor Module is ideal for detecting air pollutants and harmful gases like CO2, ammonia, benzene, smoke, and more. Commonly used in air purifiers, smart ventilation, and indoor air quality systems, it gives analog and digital outputs for flexible integration.
⚙️ Key Features:
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Operating Voltage: 5V DC
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Gas Detection Range: CO2, NH3, benzene, smoke, alcohol, and more
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Output Type: Analog (AO) and Digital (DO)
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Preheat Time: ~20 seconds for stable readings
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High Sensitivity: Adjustable threshold with potentiometer
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Durable Design: Long lifespan and quick response time
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Interface: 4-pin header (VCC, GND, DO, AO)
💡 Applications:
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Air quality monitoring systems
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Smart HVAC and air purifiers
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Industrial and indoor environmental sensing
