MQ-135 Air Quality Gas Sensor Module

Description

MQ-135 Air Quality Gas Sensor Module

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

Pin Configuration:

Pin No: Pin Name: Description

For Module

1 Vcc Used to power the sensor, Generally the operating voltage is +5V.

2 Ground Used to connect the module to system ground.

3 Digital Out You can also use this sensor to get digital output from this pin, by setting a threshold value using the potentiometer.

4 Analog Out This pin outputs 0-5V analog voltage based on the intensity of the gas.

For Sensor

1 H -Pins Out of the two H pins, one pin is connected to supply and the other to ground

2 A-Pins The A pins and B pins are interchangeable. These pins will be tied to the Supply voltage.

3 B-Pins

A pins and B pins are interchangeable. One pin will act as output while the other will be pulled to ground.