MQ6 LPG Propane Gas Sensor Module

MQ6 LPG Propane Gas Sensor Module

The MQ?6 Gas Sensor Module is a low?cost semiconductor gas sensor designed for detecting LPG (liquefied petroleum gas), propane, butane, and other combustible gases in the air. It uses a sensitive tin dioxide (SnO?) sensing element whose electrical resistance decreases in the presence of target gases. The module includes an onboard heater to maintain optimal operating temperature and provides analog output (and often a digital comparator output) for easy interfacing with microcontrollers such as Arduino, ESP32, or Raspberry Pi (with ADC). The MQ?6 module is widely used in safety systems, gas leak detection devices, and embedded projects where basic combustible gas monitoring is needed.

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Features

• Detects LPG, propane, butane, and other combustible gases
• High sensitivity to target gases
• Analog output proportional to gas concentration
• Often includes digital output with adjustable threshold (potentiometer)
• Integrated heater for stable operation
• Low cost and long operational life
• Easy to interface with microcontrollers (ADC required)
• Compact module suitable for prototyping and embedded systems

Applications

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