MQ-2 Gas Sensor Module - Detect H2, LPG, CH4, CO, Smoke & Propane

Reliable multi-gas detection module from The Tech Depot, Bengaluru. The MQ-2 sensor module provides accurate, real-time detection of combustible gases and smoke - ideal for safety systems, IoT projects, and industrial monitoring. Fast shipping, 7-day warranty on manufacturing defects, and expert support included.

Specifications

Sensor Type	MQ-2 Semiconductor Gas Sensor (SnO2-based)
Detectable Gases	H2, LPG, CH4, CO, Alcohol, Smoke, Propane
Operating Voltage	5V DC
Output Type	Analog (A0) + Digital (D0) with onboard comparator
Detection Range	300 - 10,000 ppm (varies by gas)
Preheat Time	~20 seconds for stable readings
Sensitivity Adjustment	Onboard potentiometer for digital threshold tuning
Indicator LEDs	Power LED + Digital Output trigger LED
Interface	4-pin header (VCC, GND, A0, D0)
Comparator IC	LM393 dual comparator
Board Dimensions	~32 mm x 20 mm
Mounting	Screw-hole for secure installation
Compatibility	Arduino, ESP32, ESP8266, Raspberry Pi, STM32, and all 5V-logic microcontrollers
Origin	Original/Authentic
Warranty	7-day warranty on manufacturing defects
Support	Email & WhatsApp 24/7

Why Choose This MQ-2 Gas Sensor Module?

Multi-Gas Detection: A single module detects hydrogen, LPG, methane, carbon monoxide, smoke, propane, and alcohol vapors - versatile protection in one compact board
Dual Output Modes: Analog output for precise concentration measurement and digital output for simple threshold-based triggering - use either or both simultaneously
Adjustable Sensitivity: Onboard potentiometer lets you fine-tune the digital trigger threshold to match your specific environment and application requirements
Plug-and-Play with Arduino & ESP32: Standard 4-pin header connects directly to any microcontroller - read analog values with analogRead() or monitor digital pin for instant alerts
Fast Response Time: High-sensitivity SnO2 sensing element responds quickly to changes in gas concentration, providing near-real-time detection for safety-critical applications
100% Authentic: Sourced directly from trusted, authorized suppliers - genuine MQ-2 sensing element with proper calibration characteristics
1-5 days shipping: Ships from our Bengaluru warehouse to most locations across India, with same-day delivery available in Bengaluru
Expert Technical Support: Full guidance on wiring, calibration, code integration, and troubleshooting included with every purchase

Project Ideas

Smart Home Gas Leak Alarm: Build an LPG and natural gas leak detector with buzzer and SMS/push notification alerts using Arduino or ESP32 - protect your kitchen and home from dangerous leaks
IoT Air Quality Monitor: Combine with ESP8266/ESP32 and cloud platforms like Blynk, ThingSpeak, or Home Assistant to remotely monitor gas levels and smoke from anywhere via your smartphone
Fire & Smoke Detection System: Create an early-warning smoke detector that triggers alarms, activates exhaust fans, or sends emergency alerts before visible flames appear
Industrial Safety Monitor: Deploy in workshops, factories, or warehouses to continuously monitor for combustible gas accumulation and trigger automated ventilation or shutdown systems
Carbon Monoxide Detector: Build a CO safety monitor for enclosed spaces like garages, basements, or rooms with gas heaters - critical for preventing silent CO poisoning
Robotics & Autonomous Systems: Integrate into mobile robots for hazardous environment exploration - detect gas leaks in mines, pipelines, or disaster zones
Educational Lab Projects: Perfect for learning about analog-to-digital conversion, sensor calibration curves, threshold logic, and real-world embedded systems design
Multi-Sensor Environmental Station: Combine with temperature (DHT22), humidity, dust (GP2Y1010AU0F), and air quality (MQ-135) sensors for a comprehensive environmental monitoring dashboard

How It Works

The MQ-2 module uses a tin dioxide (SnO2) semiconductor sensing element. In clean air, SnO2 has relatively high electrical resistance. When combustible gas molecules contact the heated sensing surface, they reduce the SnO2, lowering its resistance proportionally to gas concentration. The onboard circuit converts this resistance change into an analog voltage (0-5V on the A0

Frequently Asked Questions

When will I receive my order?

Products ship within 1-5 days from our Bengaluru warehouse. Delivery within 7-8 days to most locations across India.

Is technical support available?

Yes, 24/7 support via email and WhatsApp for setup, troubleshooting, and application guidance.

What is your return policy?

7-day returns on manufacturing defects only. Full refund or replacement. Not applicable for user damage or misuse.

Are bulk discounts available?

Yes, wholesale pricing on orders of 10+ units. Contact us via WhatsApp or email for a custom quote.

Buy MQ-2 Gas Sensor Module For H2, LPG, CH4, CO, Smoke or Propane Detector Module Online in India

Purchase the MQ-2 Gas Sensor Module For H2, LPG, CH4, CO, Smoke or Propane Detector Module online at The Tech Depot - India's most trusted electronics components store. We deliver across all major cities including Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on MQ-2 Gas Sensor Module For H2, LPG, CH4, CO, Smoke or Propane Detector Module with fast 1-5 day shipping from our Bengaluru warehouse. All products are 100% authentic, sourced from authorized distributors with 7-day warranty on manufacturing defects.

Looking to buy MQ-2 Gas Sensor Module For H2, LPG, CH4, CO, Smoke or Propane Detector Module at the best price in India? The Tech Depot offers competitive pricing, bulk discounts for orders of 10+ units, and dedicated technical support via email and WhatsApp. Whether you are a hobbyist, student, or professional engineer, we have everything you need for your electronics projects.

MQ-2 Gas Sensor Module For H2, LPG, CH4, CO, Smoke or Propane Detector Module