arduino › sensor module
generic MQ-2 Combustible Gas / Smoke Sensor
Heater pulls ~150 mA at 5V — too much for an ESP32 USB rail without external power. Needs a 24-hour burn-in to stabilize before any calibration is meaningful.
Specifications
- interface
- analog_or_digital
- voltage v
- 5v
- library arduino
- none (analogRead)
- accuracy
- 200-10000ppm LPG/butane/methane/smoke
- range
- see accuracy
- pin count
- 4
Sources
- SparkFun open product catalog · ingest 2026-05-06