MQ5 LPG Natural Gas Sensor Module

MQ5 LPG Natural Gas Sensor Module 

The MQ-5 Gas Sensor Module is a semiconductor gas sensor board designed to detect LPG (liquefied petroleum gas), natural gas (methane), and other combustible gases in the air. It contains an MQ-5 sensing element made of tin dioxide (SnO?), whose resistance changes when exposed to target gases. The module includes a heater to bring the sensing element up to its optimal operating temperature, and it provides both analog output (for gas concentration) and often a digital output (via a built-in comparator) for easy microcontroller interfacing. The MQ-5 is commonly used in safety and monitoring applications where basic combustible gas detection is needed.

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Features

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

Applications

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