This sensor can measure the concentration present in the air.

It is often used to achieve the ethymoletre.

Simple to use, it requires only a load resistance of 200 kohm to be used with a card Arduino.

But 200 kohm is the theory, in practice 10 kohm is better, so that's why we provide you with a 220 kohms resistance and resistance of 10 kohm with MQ3 sensor.

Features

• Power supply: 5V
• High sensibility to alcohol and low sensiblitye in Benzene
• Very responsive