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MQ-135 5V air quality sensor detects CO2, ammonia NH3, smoke, benzene
The MQ-135 module is a versatile air quality sensor powered at 5V. It effectively detects pollutants such as CO2, ammonia (NH3), benzene, and smoke. The device has a built-in potentiometer for smooth sensitivity adjustment and dual signal output-digital and analog. Its compact size makes the sensor ideal for home monitoring stations, smart ventilation systems, and advanced projects on popular microcontrollers such as Arduino or Raspberry Pi.
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