{"product_id":"mq-4-methane-gas-sensor-module-for-arduino-diy-compoden","title":"MQ-4 Methane Gas Sensor Module for Arduino \u0026 DIY - Compoden","description":"\u003ch1\u003eMQ-4 Methane Gas Sensor Module\u003c\/h1\u003e\n\u003cp\u003eThe MQ-4 is a semiconductor methane (CH4) gas sensor module designed to detect natural gas leaks. It provides analog output proportional to gas concentration, making it ideal for home safety alarms and air quality monitors. Its high sensitivity to methane and quick response time allow for early detection of dangerous gas levels.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\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\u003eDetection Gas\u003c\/td\u003e\n\u003ctd\u003eMethane (CH4)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eConcentration Range\u003c\/td\u003e\n\u003ctd\u003e200 - 10000 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePreheat Time\u003c\/td\u003e\n\u003ctd\u003e~2 minutes\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003eAnalog (0-5V)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHeater Consumption\u003c\/td\u003e\n\u003ctd\u003e≤750mW\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eMethane leak alarm with buzzer\u003c\/li\u003e\n  \u003cli\u003eIoT natural gas monitor using ESP8266\u003c\/li\u003e\n  \u003cli\u003eSmart kitchen safety system with exhaust fan control\u003c\/li\u003e\n  \u003cli\u003eArduino-based gas level data logger\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eCompatible with any microcontroller board that reads analog voltage, including Arduino Uno, Nano, Mega, ESP32, and Raspberry Pi (with ADC). Operates at 5V; for 3.3V logic, use a voltage divider or logic level converter. Pairs well with relay modules for automatic shutoff valves.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to 5V, GND to ground, and AOUT to an analog input pin. The sensor draws up to 150 mA during preheat; ensure the power supply can handle the surge. For stable readings, let it warm up for 2 minutes before use.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\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\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno?\u003c\/summary\u003e\u003cp\u003eYes, the MQ-4 outputs an analog voltage that can be read directly by any Arduino Uno analog pin. Use a 10K pull-down resistor on the output for cleaner readings.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow long does the sensor need to warm up?\u003c\/summary\u003e\u003cp\u003eThe MQ-4 requires a preheat time of about 2 minutes to stabilize readings. During this time, the heater element reaches its operating temperature.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan it detect LPG?\u003c\/summary\u003e\u003cp\u003eThe MQ-4 is primarily sensitive to methane, but it can also respond to LPG, though with lower sensitivity. For accurate LPG detection, consider the MQ-6 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":53445129634157,"sku":"CDN-0782","price":90.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_8ddbdf33-bcc3-4ad5-8abd-5346c5645faa.jpg?v=1781513479","url":"https:\/\/compoden.com\/products\/mq-4-methane-gas-sensor-module-for-arduino-diy-compoden","provider":"Compoden","version":"1.0","type":"link"}