MQ135 Air Quality Sensor (Arduino & Pi Compatible)

This Air Quality Sensor to detect NH3,NOx, alcohol, Benzene, smoke and CO2 concentrations in the air. An analog signal increases as the concentration of pollutants increase in the air. This module also includes a digital output pin with TTL output. The Potentiometer on board is used to set the Digital Output Setpoint. 

Specifications:

• Useful for detecting harmful gases in the environment including ammonia, sulfide, benzene vapor, smoke, etc
• Wide detecting scope
• High sensitivity & stability
• Simple drive circuit
• Type: MQ135
• Detection Zone: 10 - 1000ppm
• Load Resistance:10K (variable via onboard potentiometer)
• Heating Current:≤150mA
• Heating Voltage:5.0V±0.1V
• Operating Conditions:
• Ambient Temperature:-10℃～+45℃
• Humidity:≤95%RH
• Operating Voltage: 5V
• Compatible with Arduino & Raspberry Pi
• Pinout:
• VCC: 5V
• AOUT: Analog Output
• DOUT: Digital Output
• GND: 0V