Gas Sensor MQ2

The MQ-2 Gas Sensor is a versatile and cost effective gas detection solution designed for detecting flammable gases and smoke in indoor environments.

It is sensitive to gases such as LPG, propane, methane, hydrogen, and smoke, making it ideal for building gas leakage alarms, fire detection systems, air quality monitors, and smart safety devices.

The module features both:

• Analog Output (A0) - For reading gas concentration levels.

• Digital Output (D0) - With adjustable threshold via onboard potentiometer.

When gas concentration exceeds the set threshold, the digital output is triggered, perfect for activating buzzers, relays, or alert systems.

Whether you're building a home safety system, an IoT environmental monitor, or a STEM learning project, the MQ-2 is a reliable and widely used sensor in the maker community.

Highlights:

• Detects: LPG, propane, methane, hydrogen, smoke & flammable gases.
• Analog + Digital output: Adjustable sensitivity via onboard potentiometer.
• Built-in: LM393 comparator for digital trigger output.
• Operating voltage: 5V.
• Ideal for: Arduino, ESP32, Raspberry Pi (with ADC) & safety projects.

Specifications:

• Operating Voltage: 5V.
• Output Type: Analog (A0) & Digital (D0).
• Digital Output: Adjustable threshold (potentiometer).
• Indicator Led: Yes.
• Preheat Time: ~20 seconds minimum (recommended longer for stable readings).
• Dimensions: ~32×20×22mm.
• Interface: 4-pin (VCC, GND, A0, D0).

Ideal For:

• 🔔 Gas leakage alarm systems.
• 🔥 Fire & smoke detection projects.
• 🏠 Smart home safety systems.
• 🌍 IoT environmental monitoring stations.
  
• 🎓 Arduino & STEM education projects.
  

Note:

• Product appearance may vary slightly from the images shown.
  
• Text or markings on the sensor may differ depending on the batch.