MQ-135 Gas Sensor

Overview

• 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

Specifications

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

Applications

• Air quality monitor

How to Use

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)

Development resources: demo codes, schematic, datasheets, etc.
Wiki: www.waveshare.com/wiki/MQ-135_Gas_Sensor

Package Content

• MQ-135 Gas Sensor x1
• 4-pin custom connector jumper wire x1