MQ-4 is a sensor capable of detecting CH4, natural gas for the purpose of detecting gas leakage in various living areas, industrial areas. It can detect gases such as natural gas, alcohol, food and cigarette smoke.

MQ-4 Sensor specifications:

• Working voltage: 5V DC
• Microprocessor compatible TTL output.
• Analog output. The output voltage varies proportionally to the gas concentration in the air.
• High sensitivity. It precisely measures the concentration of Natural Gas, Methane Gas (CH4).
• It has low sensitivity in smoke and alcohol measurement.
• Measuring December: 300-10000 ppm
• It has a long working life and stability.
• Fast response time.
• Ease of plug/unplug for testing with socket probes.
• Works compatible with Arduino and other development boards.