{"product_id":"mq-3-alcohol-detector-gas-sensor-module","title":"MQ-3 Alcohol Detector Gas Sensor Module","description":"\u003cmeta name=\"description\" content=\"Buy MQ3 Alcohol Detector Gas Sensor Module online in India at best price from The Tech Depot, Bengaluru. Authentic product, 7-day warranty on manufacturing defects, fast delivery across India.\"\u003e\n```html\n\u003ch1\u003eMQ-3 Alcohol Detector Gas Sensor Module\u003c\/h1\u003e\n\u003cp\u003eDetect alcohol vapors and ethanol concentrations with the MQ-3 Gas Sensor Module - a reliable and affordable solution for breathalyzer projects, safety systems, and air quality monitoring. Available at The Tech Depot, Bengaluru, with fast shipping and full technical support.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensor Type\u003c\/td\u003e\n\u003ctd\u003eMQ-3 Semiconductor Gas Sensor (SnO2)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTarget Gas\u003c\/td\u003e\n\u003ctd\u003eAlcohol (Ethanol), with sensitivity to benzine, methane, LPG, and hexane\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDetection Range\u003c\/td\u003e\n\u003ctd\u003e0.04 mg\/L - 4 mg\/L Alcohol Concentration\u003c\/td\u003e\n\u003c\/tr\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\u003eHeater Voltage\u003c\/td\u003e\n\u003ctd\u003e5V AC\/DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeater Power Consumption\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;= 750 mW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003eAnalog (A0) and Digital (D0)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDigital Output\u003c\/td\u003e\n\u003ctd\u003eTTL level with onboard comparator and adjustable potentiometer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePreheat Time\u003c\/td\u003e\n\u003ctd\u003e~20 seconds (recommended 24-48 hours for first use calibration)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensitivity Adjustment\u003c\/td\u003e\n\u003ctd\u003eOnboard trimmer potentiometer for digital threshold tuning\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIndicator LEDs\u003c\/td\u003e\n\u003ctd\u003ePower LED and Digital Output Trigger LED\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-10 degreesC to 50 degreesC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Humidity\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;= 95% RH (non-condensing)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBoard Dimensions\u003c\/td\u003e\n\u003ctd\u003e~32 mm x 20 mm (compact breakout module)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eM3 mounting hole for secure installation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface Pins\u003c\/td\u003e\n\u003ctd\u003eVCC, GND, A0 (Analog Out), D0 (Digital Out)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Platforms\u003c\/td\u003e\n\u003ctd\u003eArduino, ESP32, ESP8266, Raspberry Pi (with ADC), STM32, PIC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eOriginal\/Authentic MQ-3 Sensor Element\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e7-day warranty on manufacturing defects\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupport\u003c\/td\u003e\n\u003ctd\u003eEmail \u0026amp; WhatsApp 24\/7 Technical Assistance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Sensitivity to Alcohol Vapors:\u003c\/strong\u003e The MQ-3 uses a tin dioxide (SnO2) sensing element that exhibits a significant change in conductivity when exposed to alcohol, providing reliable detection even at low concentrations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual Output Modes:\u003c\/strong\u003e Analog output (A0) delivers a variable voltage proportional to gas concentration for precise readings, while the digital output (D0) provides a simple HIGH\/LOW trigger based on the adjustable threshold - ideal for alarm-based systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOnboard Potentiometer:\u003c\/strong\u003e Fine-tune the digital trigger threshold without any external components, allowing quick calibration for different sensitivity requirements and environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast Response \u0026amp; Recovery:\u003c\/strong\u003e Rapid detection response time with quick recovery, making it suitable for real-time monitoring and repeated measurements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide Detection Range:\u003c\/strong\u003e Covers alcohol concentrations from 0.04 mg\/L to 4 mg\/L, suitable for everything from trace detection to high-concentration environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact Breakout Board:\u003c\/strong\u003e The sensor comes pre-soldered on a convenient PCB module with clearly labeled pins, indicator LEDs, and a mounting hole for easy integration into projects and enclosures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal Microcontroller Compatibility:\u003c\/strong\u003e Works seamlessly with Arduino Uno\/Nano\/Mega, ESP32, ESP8266, Raspberry Pi (via external ADC like MCP3008), STM32, and virtually any 5V-compatible microcontroller platform.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow Cost, High Value:\u003c\/strong\u003e An extremely affordable sensor module that delivers dependable performance for prototyping, education, and real-world safety applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose the MQ-3 from The Tech Depot?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e100% Authentic Sensor:\u003c\/strong\u003e Genuine MQ-3 sensing element sourced from authorized distributors - no clones or substandard imitations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTested \u0026amp; Quality Checked:\u003c\/strong\u003e Every module undergoes inspection before dispatch to ensure proper heater function and sensor response.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1-5 days shipping:\u003c\/strong\u003e Fast delivery across India from our Bengaluru warehouse. Same-day dispatch available for orders placed before 2 PM.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExpert Technical Support:\u003c\/strong\u003e Get help with wiring, code, calibration, and troubleshooting from our engineering team via email and WhatsApp - available 24\/7.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComprehensive Documentation:\u003c\/strong\u003e We provide wiring diagrams, sample Arduino code, and calibration guidance to get you started immediately.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrusted by Engineers \u0026amp; Students:\u003c\/strong\u003e Thousands of makers, students, and professionals across India rely on The Tech Depot for quality components.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eHow It Works\u003c\/h2\u003e\n\u003cp\u003eThe MQ-3 sensor module operates on the principle of chemiresistance. The core sensing element is a small bead of tin dioxide (SnO2)\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhen will I receive my order?\u003c\/summary\u003e\n\u003cp\u003eProducts ship within 1-5 days from our Bengaluru warehouse. Delivery within 7-8 days to most locations across India.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs technical support available?\u003c\/summary\u003e\n\u003cp\u003eYes, 24\/7 support via email and WhatsApp for setup, troubleshooting, and application guidance.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is your return policy?\u003c\/summary\u003e\n\u003cp\u003e7-day returns on manufacturing defects only. Full refund or replacement. Not applicable for user damage or misuse.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre bulk discounts available?\u003c\/summary\u003e\n\u003cp\u003eYes, wholesale pricing on orders of 10+ units. Contact us via WhatsApp or email for a custom quote.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003ch2\u003eBuy MQ-3 Alcohol Detector Gas Sensor Module Online in India\u003c\/h2\u003e\n\u003cp\u003ePurchase the \u003cstrong\u003eMQ-3 Alcohol Detector Gas Sensor Module\u003c\/strong\u003e online at \u003ca href=\"https:\/\/thetechdepot.in\"\u003eThe Tech Depot\u003c\/a\u003e - 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 \u003cstrong\u003eMQ-3 Alcohol Detector Gas Sensor Module\u003c\/strong\u003e 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.\u003c\/p\u003e\n\u003cp\u003eLooking to buy \u003cstrong\u003eMQ-3 Alcohol Detector Gas Sensor Module\u003c\/strong\u003e 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.\u003c\/p\u003e","brand":"The Tech Depot","offers":[{"title":"Default Title","offer_id":48746570678529,"sku":"TTD-17971","price":424.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/1577\/3185\/files\/bf521bddaabe8aa09486bceb537fee56.jpg?v=1778107803","url":"https:\/\/techdepot.in\/products\/mq-3-alcohol-detector-gas-sensor-module","provider":"Tech Depot India","version":"1.0","type":"link"}