MQ-2 Gas Sensor Module, Digital Output, 4-Pin Interface

The MQ-2 Gas Sensor Module is a powerful and easy-to-use sensor designed to detect combustible gases such as LPG, propane, methane, butane, smoke, and hydrogen. It features a digital output with a 4-pin interface, allowing for quick integration with Arduino, ESP32, Raspberry Pi, and other microcontroller platforms.

Ideal for gas leak detection systems, fire safety alarms, and smart home security projects, this module helps add a layer of safety to your DIY electronics.

✅ Key Features:

🔥 Detects smoke, LPG, propane, methane, butane, and hydrogen

🎯 Adjustable sensitivity with onboard potentiometer

🔌 Digital output (High/Low) for easy microcontroller interfacing

💡 LED indicators for power and signal status

🧩 Compatible with Arduino, ESP8266, NodeMCU, etc.

📐 Specifications:

ParameterDetailsSensor TypeMQ-2 Gas SensorDetectable GasesLPG, methane, butane, propane, hydrogen, smokeOperating Voltage3.3V – 5V DCOutput TypeDigital (HIGH/LOW)Interface4-pin (VCC, GND, D0, A0)Sensitivity ControlOnboard potentiometerPreheat Time20 seconds (approx.)LED IndicatorsPower (Green), Output (Red)Dimensions~32mm x 20mmWorking Temperature-10°C to 50°C

🚀 Applications:

Gas leakage detection systems

Smoke/fire alarms

Smart kitchen and home safety devices

DIY IoT safety monitoring projects

Industrial gas monitoring (educational use)

7 days replacement warranty applicable only for manufacturing defects. No warranty for physical damage or misuse.

Q1. Are these products tested before shipping?

A: Yes, all components are pre-checked and securely packed to ensure they are in working condition at the time of dispatch.

Q2. Do you offer a warranty?

A: Yes, we offer a 7-day replacement warranty only for manufacturing defects. Physical damage or misuse is not covered.

Q3. How can I claim a replacement?

A: If there’s a manufacturing issue, please contact us within 7 days of delivery with an unboxing video and a clear description of the issue. We’ll guide you through the process.

Q4. How long will delivery take?

A: Orders are usually shipped within sameday if ordered before 2pm & next day dispatch for after 2pm orders. Delivery time depends on your location and courier partner, typically 3–7 working days.

Q5. Is GST invoice available?

A: Yes, we provide a GST invoice with every order. Please enter your GST details at checkout if applicable.

Still have questions?

📩 Chat with us via the WhatsApp icon or email us at enquiry@circuitranger.in