MQ-2 gas sensor module for Arduino

Size: 32mm x 22mm x 27mm / 1.26'' x 0.86'' x 1.06''
Main Chip: The LM393, ZYMQ-2 Gas Sensor
Working Voltage: DC 5 V
Great for home or factory gas leakage detection
Use for Detecting: Combustible gases such as LPG, butane, methane, alcohol, propane, hydrogen, and smoke.