Need help in identifying hardware

Hi guys. A friend sent me some Arduino hardware and I need some help figuring out what it is, what it does, or at least its name and model number.

What is this and what does it do?

OP's picture

Looks like a gas sensor.

Yeah, it's an MQ type gas sensor. There are many types, each with different sensitivities. There should be a number like MQ-13, or MQ-2 printed on it, usually in the side of the cylindrical housing. Here is a page about them.

uxomm:
OP's picture


Looks like a gas sensor.

ChrisTenone:
Yeah, it's an MQ type gas sensor. There are many types, each with different sensitivities. There should be a number like MQ-13, or MQ-2 printed on it, usually in the side of the cylindrical housing. Here is a page about them.

Thanks to both of you guys!

Have you been able to identify which gas sensor it is?

ChrisTenone:
Have you been able to identify which gas sensor it is?

Yes, it's an MQ-2. Funnily enough, I never noticed the number till now!

Oh, that's a good one! It detects leaking natural gas and other flammable vapors, and here is how to use it.