Gas Sensor (MQ2)

I needed something to detect a small propane leak near my workshop and this little module hooked up to an Arduino reads changes clearly in about five seconds. Feels solid enough for daily use, and the sensitivity dial helps adjust for different gases like methane or alcohol easily.

Finally got around to calibrating this for methane detection in my workshop, and the sensitivity adjustment is super straightforward. It picked up a tiny gas leak from my old heater within seconds—exactly what I needed.

I set this up to monitor for propane leaks in my workshop, and the sensitivity is impressive — it picked up a small alcohol spill from across the room. The analogue output makes it easy to integrate with my existing arduino setup.