MQ 135 Air Quality/Gas Detector Sensor Module For Arduino

The MQ-135 Air Quality/Gas Detector Sensor Module is a widely used sensor module designed to detect a range of air pollutants and gases.

Here’s a comprehensive overview of the MQ-135 sensor module:

• Purpose: The MQ-135 sensor module is designed to detect a variety of gases and air pollutants, making it suitable for air quality monitoring and environmental sensing applications.
• Sensitivity: It exhibits varying sensitivity to gases like ammonia, nitrogen dioxide, benzene, carbon monoxide, and other harmful substances.
• Principle: The sensor uses a semiconductor gas sensor where the resistance of the sensing material changes based on the concentration of gases in the air.

Features

• Multi-Gas Detection: The MQ-135 module is capable of detecting various gases and pollutants, offering a wide range of applications.
• Analog Output: The module typically provides an analog voltage output that can be correlated to the concentration of the detected gas.
• Versatility: Due to its broad sensitivity to multiple gases, it’s suitable for diverse air quality monitoring projects.
• Affordability: The MQ-135 sensor module is cost-effective, making it a popular choice for hobbyists and environmental monitoring enthusiasts.

Using the MQ-135:

• Powering the Sensor: The sensor usually requires a 5V DC power supply.
• Calibration: Calibration might be necessary for accurate readings. This involves exposing the sensor to clean air to establish a baseline resistance value.
• Reading Values: The analog output voltage from the MQ-135 module can be connected to an analog pin on a microcontroller (e.g., Arduino) to read the gas concentration. The specific gas being detected can be inferred from calibration data.

Technical Details Of MQ-135 Sensor Module

• Model: MQ-135
• Operating Voltage (VDC): 5
• Detecting Range: 100ppm to 1000ppm

Physical Attributes

• Length * Width * Height (mm): 36 x 19 x 21
• Weight (gm): 6

Package Includes

• 1 x MQ 135 Air Quality/Gas Detector Sensor Module For Arduino