Home Question Answer What happens when a cloud of smoke is created using an incense stick near the MQ2 gas sensor? What happens when a cloud of smoke is created using an incense stick near the MQ2 gas sensor? When a cloud of smoke is created using an incense stick near the MQ2 gas sensor, the second LED will glow green. Related Questions What is an MQ2 gas sensor? What type of gas sensor is used in fire alarm systems? How does an MQ2 gas sensor work? What type of gases can an MQ2 gas sensor detect? What are the output pins of an MQ2 gas sensor? What is the power requirement for an MQ2 gas sensor? What are the real-time applications of MQ2 gas sensors? How is an MQ2 gas sensor triggered? Load More