Arduino drives MQ9 to simulate carbon monoxide gas sensor (gas sensor)

Table of contents

1. Sensor characteristics

2. Hardware schematic diagram

3. Controller and sensor wiring diagram

4. Driver

---

The MQ-9 is a very sensitive sensor for carbon monoxide, methane and liquefied petroleum gas. It can be applied to many scenes of combustible gas detection such as CO. By combining with Arduino, users can create many low-cost probing solutions.