MQ5 LPG Natural Gas Sensor

MQ5 LPG Natural Gas Sensor 

The MQ-5 Gas Sensor is a semiconductor gas sensor designed to detect LPG (liquefied petroleum gas), natural gas (methane), and other combustible gases in the air. It uses a tin dioxide (SnO?) sensing material whose electrical resistance changes in the presence of these gases. The sensor requires a heater to reach its optimal operating temperature and provides an analog output that varies with gas concentration. It is widely used in basic gas detection systems, safety monitors, and embedded electronics projects.

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Features

• Sensitive to LPG, natural gas (methane), and other combustible gases
• High sensitivity to target gases
• Provides an analog output corresponding to gas concentration
• Requires a heater for stable operation
• Simple to interface with microcontrollers (ADC input required)
• Compact size suitable for prototyping and embedded designs
• Long service life and low cost

Applications

• LPG or natural gas leak detection in kitchens, homes, and storage areas
• Gas leak alarm systems and safety monitoring
• Portable gas detector devices
• Environmental air quality sensing
• Industrial combustible gas detection systems
• Smart home automation gas alerts
• Educational and hobbyist electronics projects
• Embedded IoT gas sensing applications