MQ-2 Flammable Gas / Smoke Sensor Module MQ2 Detector (DO + AO) for Arduino
The MQ-2 is a semiconductor gas sensor designed for detection of flammable gases and smoke. Flammable Gas & Smoke Detector – 5V AO / DO Output. Output Type: Analog (AO) and Digital (DO). Detection Range: 300–10,000 ppm (flammable gases).