The MQ4 is used in gas leakage detecting equipment in consumer and industry markets,this sensor is suitable for detecting CH4,Natural gas, LNG, avoid exposure to alcohol, cooking fumes, and cigarette smoke. The sensitivity can be adjusted by the potentiometer. Come with cables

Specification:

• Power supply: 5V
• Interface type: Analog
• Pin Definition: 1-Output 2-GND 3-VCC
• High sensitivity to CH4, Natural gas
• Small sensitivity to alcohol, smoke
• Fast response
• Stable and long life
• Simple drive circuit
• Size: 40x20mm