MQ-135 Air Quality Sensor Detection Module

Features

Broad detection area;
Fast response and high sensitivity;
Resistance and lifetime;
Simple drive circuit;

Application

We use in building / office air quality control equipment, suitable for detection of NH3, NOx, alcohol, benzene, smoke, CO2 etc.

Specifications

Standard conditions:
Circuit voltage 5V ± 0.1
Heating voltage 5V ± 0.1
Power consumption less than 800mW
Medium conditions:
Temp. Use -10 ℃ - 45 ℃
Temp. Storage -20 ℃ - 70 ℃

Dimensions: 32x20x24mm

Wiring

Video tutorial & code

https://www.hackster.io/karimmufte/arduino-and-mq-135-gas-sensor-with-arduino-code-a8c1c6

Datasheet

https://www.olimex.com/Products/Components/Sensors/SNS-MQ135/resources/SNS-MQ135.pdf