MQ-6 LPG, Propane, and Butane Gas Sensor
The MQ-6 Gas Sensor detects Liquefied Petroleum Gas (LPG), Propane, and Butane in the air with high sensitivity and reliability. It uses a Tin Dioxide (SnO₂) sensing layer that changes its electrical conductivity when these gases contact the sensor’s surface.
In clean air, the sensor maintains low conductivity. When LPG or similar gases enter its detection area, the conductivity rises sharply. This change generates an analog signal that you can read directly with a microcontroller such as Arduino or Raspberry Pi, or with dedicated industrial monitoring equipment.
The MQ-6 reacts quickly to gas leaks, allowing you to build responsive safety systems. Its wide detection range supports applications from small kitchen gas leak alarms to large-scale industrial monitoring systems. The stainless steel mesh protects the sensing element from dust, dirt, and physical damage while still allowing gases to pass through efficiently.
With proper integration, you can use the MQ-6 in home safety devices, portable leak detectors, and factory safety systems. The sensor’s compact design, low power consumption, and strong mechanical construction make it a dependable choice for both DIY projects and professional applications.
Features
High sensitivity to LPG, propane, and butane
Wide detection range: 200 – 10,000 ppm
Fast response and recovery times
Analog output for easy integration
Durable and long-lasting semiconductor sensing element
Stainless steel mesh for protection and filtering
Low cost with stable performance
Compact design for versatile applications
Specifications
| Property | Value |
|---|---|
| Model | MQ-6 |
| Gases Detected | LPG, Propane, Butane |
| Detection Range | 200 – 10,000 ppm |
| Sensor Type | Semiconductor (SnO₂) |
| Operating Voltage | 5V DC |
| Heating Voltage | 5V DC (±0.1V) |
| Load Resistance | Adjustable (10 kΩ typical) |
| Preheat Time | 24 hours |
| Response Time | ≤ 10 seconds |
| Recovery Time | ≤ 30 seconds |
| Operating Temp | -20°C to 50°C ‘ |
| Operating Humidity | 15% – 90% RH (non-condensing) |
| Life Expectancy | ≥ 5 years in clean air |
| Output | Analog voltage |
| Dimensions | ~32 × 20 × 22 mm |
Applications
Home Safety Systems – Detect LPG or propane leaks from stoves, heaters, and cylinders
Portable Gas Leak Detectors – Handheld devices for on-site safety checks
Industrial Gas Monitoring – Factories, refineries, and storage facilities
Automotive Applications – Leak detection in gas-powered vehicles
Smart Home Automation – Integrating with IoT platforms for safety alerts
Cooking Safety Devices – Automatic gas shutoff system
