{"product_id":"mq2-gas-sensor-module-for-smoke-lpg-alcohol-detection","title":"MQ2 Gas Sensor Module for Smoke, LPG, Alcohol Detection","description":"\u003ch1\u003eMQ2 Gas Sensor Module – Smoke, LPG, and Alcohol Detection\u003c\/h1\u003e\u003cp\u003eThe MQ2 gas sensor module is a versatile sensor for detecting combustible gases such as LPG, smoke, alcohol, propane, hydrogen, and methane. It provides an analog voltage output that varies with gas concentration, making it ideal for DIY air quality monitors, gas leak alarms, and safety systems. With high sensitivity and fast response, it is a reliable choice for both hobbyist and educational projects.\u003c\/p\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDetecting Concentration\u003c\/td\u003e\n\u003ctd\u003e200-10000ppm (combustible gas)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAnalog Output\u003c\/td\u003e\n\u003ctd\u003e0-5V, proportional to gas concentration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePreheat Duration\u003c\/td\u003e\n\u003ctd\u003eOver 20 seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eAnalog pin + digital threshold (comparator)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e32mm x 22mm x 27mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-industrial-gas-leak-detector-kit\"\u003eGas leak detector for kitchens or industrial spaces\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-smoke-and-fire-safety-system\"\u003eSmoke alarm system for fire safety\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003ePortable breathalyzer for alcohol detection\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/esp32-air-quality-monitoring-cube-kit-50mm-cube-with-oled-aqi-display\"\u003eAir quality monitoring station with data logging\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eThis module operates at 5V and works seamlessly with Arduino boards (Uno, Nano, Mega) and Raspberry Pi (with an ADC if needed, as Pi lacks analog inputs). It outputs an analog signal (0-5V) that can be read by any analog input pin. For 3.3V systems, a level shifter is recommended to avoid damage.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eConnect VCC to 5V, GND to ground, and the analog output (A0) to an analog input pin on your microcontroller. Let the sensor preheat for 20-30 seconds before taking readings. Avoid operating in high-humidity or dusty environments for accurate measurements.\u003c\/p\u003e\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno?\u003c\/summary\u003e\u003cp\u003eYes, the MQ2 sensor module works directly with Arduino Uno. Connect the analog output to any analog pin and use a simple sketch to read gas concentration levels.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eHow do I calibrate the MQ2 sensor?\u003c\/summary\u003e\u003cp\u003eCalibration involves exposing the sensor to a known gas concentration and adjusting the threshold in your code. For general use, you can use pre-calibrated values from the datasheet and fine-tune based on ambient air readings.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan it detect carbon monoxide?\u003c\/summary\u003e\u003cp\u003eThe MQ2 is sensitive to many combustible gases, including carbon monoxide (CO), but it is not specific to CO. For dedicated CO detection, consider the MQ7 sensor.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53444960354669,"sku":"CDN-0374","price":110.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_5344263e-bd1c-40b6-9c36-117986ebd170.jpg?v=1781512508","url":"https:\/\/compoden.com\/products\/mq2-gas-sensor-module-for-smoke-lpg-alcohol-detection","provider":"Compoden","version":"1.0","type":"link"}