MQ135 Gas Sensor for Arduino/Raspberry Pi

The MQ135 Gas Sensor Module is a powerful and versatile air quality sensor designed to detect a wide range of harmful gases including ammonia (NH₃), sulfur (S), benzene, smoke, and carbon dioxide (CO₂). It is widely used in environmental monitoring systems and air purifiers, making it an essential tool for IoT-based air quality projects.

Compatible with Arduino, Raspberry Pi, and other microcontrollers, this sensor features both analog and digital outputs, allowing flexible integration in a variety of setups. With high sensitivity, low power consumption, and an adjustable sensitivity range, the MQ135 is ideal for DIY electronics, smart home devices, and industrial air quality solutions.

✅ Key Features:

• Detects NH₃, NOx, benzene, smoke, CO₂, and other harmful gases
• Works with Arduino, Raspberry Pi, ESP32, and other microcontrollers
• Analog and digital output support
• Adjustable sensitivity via onboard potentiometer
• Stable performance with long service life

🛠️ Common Applications:

• Indoor air quality monitoring systems
• Smart home and office automation
• Air purifiers and ventilation systems
• Environmental pollution detection
• Industrial gas leak safety systems