MQ-2 Smoke & Flammable Gas Sensor Module
The MQ-2 Gas Sensor Module is a popular gas detection module designed to detect smoke and flammable gases such as LPG, propane, methane, hydrogen, and butane. It is widely used in Arduino-based gas leak detection and safety monitoring projects.
Why Choose the MQ-2?
- Detects LPG, propane, methane, hydrogen, butane, and smoke
- Provides both analog and digital output
- Adjustable sensitivity via onboard potentiometer
- Simple interface for Arduino, ESP8266, ESP32, and Raspberry Pi
- Cost-effective for safety and school projects
What You Can Build
- Gas leak detection alarm system
- Kitchen LPG safety monitor
- Fire and smoke detection project
- IoT gas monitoring system with notifications
- Industrial prototype safety system
How It Works
The MQ-2 uses a tin dioxide (SnO₂) sensitive material whose conductivity increases when exposed to combustible gases. The onboard comparator allows you to set a threshold level for digital output triggering.
The module includes:
- AO (Analog Output) – Proportional gas concentration signal
- DO (Digital Output) – HIGH/LOW trigger based on set threshold
- Onboard potentiometer – Adjust sensitivity level
Technical Specifications
| Operating Voltage | 5V DC |
|---|---|
| Heater Voltage | 5V |
| Detection Gases | LPG, Propane, Methane, Hydrogen, Butane, Smoke |
| Concentration Range | Approx. 300–10,000 ppm |
| Output | Analog & Digital |
| Preheat Time | 20 seconds minimum (recommended longer for stable readings) |
Pin Configuration
- VCC – 5V Power
- GND – Ground
- DO – Digital Output
- AO – Analog Output
Important Notes
- The sensor requires a warm-up period before stable readings.
- Not a certified safety device. Intended for educational and prototype use only.
- Sensitivity varies based on environment and calibration.
External Resources
What’s in the Box?
- 1 × MQ-2 Gas Sensor Module
Gas Analog Smoke LPG CO Sensor MQ2
Gas Analog Smoke LPG CO Sensor MQ2
Out of stock
Product Code
SKU:AB072
Regular price
₱ 55.00
Regular price
Sale price
₱ 55.00
Unit price
per
Couldn't load pickup availability
