MQ-135 Gas Sensor (Benzene, Alcohol & Smoke)

Monitor benzene, alcohol and smoke with this MQ-135 gas sensor from Waveshare!

Note: Please do not use this sensor for critical home/industrial/commercial gas sensing applications. Intended for development and learning/hobby purposes only.

Features

• Sensitive for benzene, alcohol, smoke
• Output voltage boosts along with the concentration of the measured gases increases
• Fast response and recovery
• Adjustable sensitivity
• Signal output indicator
• Sensor only - no cable

Specifications

• Power: 2.5V ~ 5.0V
• Dimension: 40.0mm * 21.0mm
• Mounting holes size: 2.0mm

Applications

• Air quality monitor

How to Use

Product Wiki: https://www.waveshare.com/wiki/MQ-135_Gas_Sensor

In the case of working with a MCU:

• VCC ↔ 2.5V ~ 5.0V
• GND ↔ power supply ground
• AOUT ↔ MCU.IO (analog output)
• DOUT ↔ MCU.IO (digital output)