{"product_id":"mq-3-gas-sensor-module-for-alcohol-detection","title":"MQ-3 Gas Sensor Module for Alcohol Detection","description":"\u003cp data-start=\"78\" data-end=\"595\" class=\"PDq2pG_selectionAnchorContainer\"\u003eThe MQ-3 Gas Sensor Module is a semiconductor-based alcohol detection module designed to sense ethanol (alcohol) vapors in the air. Built around the MQ-3 gas sensor, it uses a tin dioxide (SnO₂) sensing element whose electrical conductivity increases as the alcohol concentration rises. The module provides both analog (AO) and digital (DO) outputs, allowing it to be easily interfaced with Arduino, ESP32, Raspberry Pi, STM32, and other microcontrollers. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"597\" data-end=\"1109\"\u003eThe module features an onboard LM393 comparator and an adjustable potentiometer for setting the digital detection threshold. It offers high sensitivity to alcohol while maintaining good resistance to interference from gasoline, smoke, and other vapors. Due to its fast response time and simple interface, the MQ-3 module is widely used in breath analyzers, vehicle safety systems, industrial monitoring, alcohol detection equipment, and educational electronics projects.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"etycth\" data-start=\"1116\" data-end=\"1133\" class=\"PDq2pG_selectionAnchorContainer\"\u003eKey Features\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h3\u003e\n\u003cul data-start=\"1135\" data-end=\"1728\"\u003e\n\u003cli data-section-id=\"1259yok\" data-start=\"1135\" data-end=\"1180\"\u003eHigh sensitivity to alcohol (ethanol) vapor\u003c\/li\u003e\n\u003cli data-section-id=\"17178w6\" data-start=\"1181\" data-end=\"1231\"\u003eTin dioxide (SnO₂) semiconductor sensing element\u003c\/li\u003e\n\u003cli data-section-id=\"rxuwrl\" data-start=\"1232\" data-end=\"1267\"\u003eAnalog and digital output signals\u003c\/li\u003e\n\u003cli data-section-id=\"14butej\" data-start=\"1268\" data-end=\"1326\"\u003eAdjustable detection threshold via onboard potentiometer\u003c\/li\u003e\n\u003cli data-section-id=\"1fzwx90\" data-start=\"1327\" data-end=\"1362\"\u003eBuilt-in LM393 voltage comparator\u003c\/li\u003e\n\u003cli data-section-id=\"17bagie\" data-start=\"1363\" data-end=\"1396\"\u003eFast response and recovery time\u003c\/li\u003e\n\u003cli data-section-id=\"6c0mz5\" data-start=\"1397\" data-end=\"1457\"\u003eGood resistance to gasoline, smoke, and vapor interference\u003c\/li\u003e\n\u003cli data-section-id=\"ththmx\" data-start=\"1458\" data-end=\"1488\"\u003ePower and output status LEDs\u003c\/li\u003e\n\u003cli data-section-id=\"6zddl9\" data-start=\"1489\" data-end=\"1513\"\u003eSimple 4-pin interface\u003c\/li\u003e\n\u003cli data-section-id=\"agelrw\" data-start=\"1514\" data-end=\"1537\"\u003eLong operational life\u003c\/li\u003e\n\u003cli data-section-id=\"112163y\" data-start=\"1538\" data-end=\"1571\"\u003eStable and reliable performance\u003c\/li\u003e\n\u003cli data-section-id=\"au5xwx\" data-start=\"1572\" data-end=\"1659\"\u003eEasy integration with Arduino, ESP32, STM32, Raspberry Pi, and other microcontrollers\u003c\/li\u003e\n\u003cli data-section-id=\"q06io0\" data-start=\"1660\" data-end=\"1728\"\u003eIdeal for breath alcohol detection and gas monitoring applications\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Roboracter","offers":[{"title":"Default Title","offer_id":46728787853366,"sku":"YCWETRJ2IY","price":129.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/0731\/2694\/files\/ChatGPT_Image_Jun_30_2026_04_27_03_PM.png?v=1782833350","url":"https:\/\/roboracter.in\/products\/mq-3-gas-sensor-module-for-alcohol-detection","provider":"Roboracter","version":"1.0","type":"link"}