MQ-135 Air Quality Sensor Module

MQ-135 Air Quality Sensor Module is used for hazardous gas detection apparatus for the family, the environment, suitable for ammonia, aromatic compounds, sulfur, benzene vapor, smoke and other gases harmful gas detection, gas-sensitive. Detection Range: 10 – 300 ppm NH3, 10 – 1000 ppm Benzene, 10 – 300 Alcohol.

Technical details 

1. Size: 32mm (length) * 22mm (width) * 27mm (height)

2. Weight: 7g

3. Main chip: LM393, MQ-5 gas sensor

4. Working voltage: DC 5 volts

5. Has a signal output indication.

6. Dual signal output (analog output AOUT and TTL level output DOUT)

7. TTL output valid signal is low level (when output low level, the signal light is on, it can be directly connected to the microcontroller)

8. Analog output 0-5V voltage, the higher the concentration, the higher the voltage

9. High sensitivity to butane, propane, and methane

10. The reference concentration can be adjusted by the blue potentiometer. The reference concentration is reduced clockwise, counterclockwise rotation, reference thick Elevated

11. Has a long service life and reliable stability

12. Fast response recovery features

Application:

A hazardous gas detection apparatus for the family, the environment. Suitable for ammonia, aromatic compounds, sulfur, benzene vapor, smoke, and other gases harmful gas detection. Gas-sensitive element test concentration range: 10 to 1000ppm