MQ-6 LPG and Butane Gas Sensor Module
High-Sensitivity Semiconductor Sensor for Combustible Gas Detection
The MQ6 gas sensor is a costeffective semiconductor device designed to detect LPG (Liquefied Petroleum Gas), iso-butane, propane, and LNG in the air. It is widely used in gas leak detection systems for home and industrial safety applications, with low sensitivity to alcohol and cooking fumes [citation:5][citation:6].
Excellent Sensitivity to LPG, Propane, and Butane - Detects a wide range of combustible gases from 200 to 10000 ppm [citation:3][citation:7]
Dual Output - Provides both analog (AO) and digital (DO) signals for easy integration with microcontrollers [citation:1][citation:9]
Operating voltage is 5V DC with heater consumption ≤ 750-900mW [citation:3][citation:7]
Use the onboard potentiometer to adjust the digital output threshold sensitivity [citation:1][citation:9]
The sensor requires a preheat time of up to 48 hours for optimal stabilization and accurate readings [citation:6][citation:7]
Technical Specifications
| Parameter | Value |
|---|
| Target Gases | LPG, Propane, Butane, LNG [citation:5][citation:6] |
| Detection Range | 200-10000 ppm (LPG, propane, etc.) [citation:3][citation:7] |
| Operating Voltage | 5V DC [citation:3][citation:5] |
| Heater Voltage | 5.0V ± 0.2V AC/DC [citation:3][citation:6] |
| Heater Resistance | 31Ω ± 3Ω (room temp) [citation:6][citation:9] |
| Heater Power | ≤ 900mW [citation:3][citation:6] |
| Output Types | Analog (AO) & Digital (DO) [citation:1][citation:9] |
| Preheat Time | ≥ 48 hours [citation:6][citation:7] |
| Operating Temp | -20°C to 50°C [citation:3][citation:5] |
= Key Features =
+High Sensitivity to Combustible Gases - Excellent response to LPG, propane, and butane over a wide concentration range [citation:5][citation:6]
+Simple Interface Standard 4pin header (VCC, GND, DO, AO) for easy connection [citation:1][citation:3]
+Adjustable Sensitivity Builtin potentiometer sets the digital output threshold [citation:1][citation:9]
+Long Service Life - Stable and durable construction for continuous monitoring [citation:5][citation:6]
+Low Cost Budgetfriendly solution for gas detection projects [citation:5][citation:8]
= Applications =
- Residential and industrial LPG leak detection systems [citation:2][citation:5]
- Gas alarm and safety monitoring devices [citation:2][citation:5]
- Portable gas detectors [citation:5][citation:8]
- IoT-based environmental monitoring projects [citation:2]
- Fire and safety detection systems [citation:5]
Reliable Safety Component - Trusted in gas leak detection systems with Arduino and ESP32
Wide Compatibility - Works with 5V logic systems including Arduino, ESP32, and Raspberry Pi
√ On-board power and signal indicators
√ 4 mounting holes for secure installation
√ Compatible with popular microcontrollers
Troubleshooting
Slow response or inaccurate readings:
- Allow the sensor to preheat for at least 48 hours for optimal stabilization [citation:6][citation:7]
- Adjust the sensitivity potentiometer for the specific environment
- Avoid exposing the sensor to contaminants such as alcohol or smoke [citation:5]
No output:
- Verify stable 5V power supply
- Check wiring connections (VCC, GND, AO, DO)
- Ensure the heater is properly connected
