MQ6 LPG Propane Gas Sensor

MQ6 LPG Propane Gas Sensor

The MQ-6 Gas Sensor is a semiconductor gas sensor designed to detect LPG (liquefied petroleum gas), propane, butane, and other combustible gases in the surrounding air. It uses a tin dioxide (SnO?) sensing element whose electrical resistance changes when exposed to these gases. The sensor requires a heater to reach its optimal operating temperature and provides an analog resistance/voltage output that varies with gas concentration. It’s widely used in basic gas detection systems, safety monitors, and embedded electronic projects.

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Features

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

Applications

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