{"product_id":"mq-3-alcohol-sensor-module","title":"MQ-3 Alcohol Sensor Module | High Sensitivity Ethanol Gas Detection","description":"\u003cp data-start=\"260\" data-end=\"653\"\u003eThe \u003cstrong data-start=\"264\" data-end=\"294\"\u003eMQ-3 Alcohol Sensor Module\u003c\/strong\u003e is a cost-effective and reliable gas sensor designed for accurate detection of alcohol (ethanol) concentration in the air. It uses \u003cstrong data-start=\"426\" data-end=\"448\"\u003eSnO₂ (tin dioxide)\u003c\/strong\u003e as its sensing material, which reacts sensitively to alcohol vapors. When alcohol is present, the sensor’s conductivity increases, converting gas concentration into a proportional voltage output signal.\u003c\/p\u003e\n\u003cp data-start=\"655\" data-end=\"841\"\u003eThe module offers high sensitivity to alcohol while maintaining strong resistance against interference from gasoline, smoke, and water vapor — making it ideal for various applications.\u003c\/p\u003e\n\u003chr data-start=\"843\" data-end=\"846\"\u003e\n\u003ch4 data-start=\"848\" data-end=\"866\"\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli data-start=\"870\" data-end=\"988\"\u003e\n\u003cstrong data-start=\"870\" data-end=\"893\"\u003eDual Signal Output:\u003c\/strong\u003e Provides both \u003cstrong data-start=\"908\" data-end=\"923\"\u003eanalog (AO)\u003c\/strong\u003e and \u003cstrong data-start=\"928\" data-end=\"944\"\u003edigital (DO)\u003c\/strong\u003e signal outputs for flexible applications.\u003c\/li\u003e\n\u003cli data-start=\"991\" data-end=\"1084\"\u003e\n\u003cstrong data-start=\"991\" data-end=\"1012\"\u003eHigh Sensitivity:\u003c\/strong\u003e Detects alcohol vapors with a wide detection range of \u003cstrong data-start=\"1067\" data-end=\"1081\"\u003e10–1000ppm\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli data-start=\"1087\" data-end=\"1205\"\u003e\n\u003cstrong data-start=\"1087\" data-end=\"1108\"\u003eClear Indicators:\u003c\/strong\u003e Dual-sided PCB with \u003cstrong data-start=\"1129\" data-end=\"1142\"\u003epower LED\u003c\/strong\u003e and \u003cstrong data-start=\"1147\" data-end=\"1175\"\u003edigital output indicator\u003c\/strong\u003e for easy status monitoring.\u003c\/li\u003e\n\u003cli data-start=\"1208\" data-end=\"1315\"\u003e\n\u003cstrong data-start=\"1208\" data-end=\"1235\"\u003eAdjustable Sensitivity:\u003c\/strong\u003e Onboard \u003cstrong data-start=\"1244\" data-end=\"1261\"\u003epotentiometer\u003c\/strong\u003e allows tuning of the digital output (DO) threshold.\u003c\/li\u003e\n\u003cli data-start=\"1318\" data-end=\"1403\"\u003e\n\u003cstrong data-start=\"1318\" data-end=\"1340\"\u003eEasy Installation:\u003c\/strong\u003e Comes with \u003cstrong data-start=\"1352\" data-end=\"1378\"\u003efour M3 mounting holes\u003c\/strong\u003e for secure attachment.\u003c\/li\u003e\n\u003cli data-start=\"1406\" data-end=\"1513\"\u003e\n\u003cstrong data-start=\"1406\" data-end=\"1427\"\u003eStable \u0026amp; Durable:\u003c\/strong\u003e Long lifespan, fast response, and quick recovery times ensure reliable performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1515\" data-end=\"1518\"\u003e\n\u003ch4 data-start=\"1520\" data-end=\"1546\"\u003eTypical Applications\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli data-start=\"1550\" data-end=\"1654\"\u003e\n\u003cstrong data-start=\"1550\" data-end=\"1570\"\u003eAlcohol Testers:\u003c\/strong\u003e Ideal for DIY projects like building a personal or vehicle alcohol breath tester.\u003c\/li\u003e\n\u003cli data-start=\"1657\" data-end=\"1764\"\u003e\n\u003cstrong data-start=\"1657\" data-end=\"1686\"\u003eEnvironmental Monitoring:\u003c\/strong\u003e Detect ethanol vapor levels in workshops, labs, or industrial environments.\u003c\/li\u003e\n\u003cli data-start=\"1767\" data-end=\"1923\"\u003e\n\u003cstrong data-start=\"1767\" data-end=\"1792\"\u003eArduino\/MCU Projects:\u003c\/strong\u003e Easily integrates with \u003cstrong data-start=\"1816\" data-end=\"1848\"\u003eArduino, ESP32, Raspberry Pi\u003c\/strong\u003e, and other microcontrollers for automation or data logging applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1925\" data-end=\"1928\"\u003e\n\u003ch4 data-start=\"1930\" data-end=\"1960\"\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cdiv class=\"_tableContainer_1rjym_1\"\u003e\n\u003cdiv class=\"group _tableWrapper_1rjym_13 flex w-fit flex-col-reverse\" tabindex=\"-1\"\u003e\n\u003ctable data-start=\"1962\" data-end=\"2380\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"1962\" data-end=\"1991\"\u003e\n\u003ctr data-start=\"1962\" data-end=\"1991\"\u003e\n\u003cth data-start=\"1962\" data-end=\"1974\" data-col-size=\"sm\"\u003eParameter\u003c\/th\u003e\n\u003cth data-start=\"1974\" data-end=\"1991\" data-col-size=\"md\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"2024\" data-end=\"2380\"\u003e\n\u003ctr data-start=\"2024\" data-end=\"2057\"\u003e\n\u003ctd data-start=\"2024\" data-end=\"2048\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2026\" data-end=\"2047\"\u003eOperating Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"2048\" data-end=\"2057\"\u003eDC 5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2058\" data-end=\"2093\"\u003e\n\u003ctd data-start=\"2058\" data-end=\"2084\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2060\" data-end=\"2083\"\u003eCurrent Consumption\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"2084\" data-end=\"2093\"\u003e150mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2094\" data-end=\"2132\"\u003e\n\u003ctd data-start=\"2094\" data-end=\"2111\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2096\" data-end=\"2110\"\u003eTarget Gas\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"2111\" data-end=\"2132\"\u003eAlcohol (Ethanol)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2133\" data-end=\"2171\"\u003e\n\u003ctd data-start=\"2133\" data-end=\"2155\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2135\" data-end=\"2154\"\u003eDetection Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"2155\" data-end=\"2171\"\u003e10 – 1000ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2172\" data-end=\"2254\"\u003e\n\u003ctd data-start=\"2172\" data-end=\"2197\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2174\" data-end=\"2196\"\u003eAO Output (Analog)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"2197\" data-end=\"2254\"\u003e0.1–0.3V in clean air, up to 4V at high concentration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2255\" data-end=\"2310\"\u003e\n\u003ctd data-start=\"2255\" data-end=\"2281\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2257\" data-end=\"2280\"\u003eDO Output (Digital)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"2281\" data-end=\"2310\"\u003eTTL-level 0\/1 (0.1V \/ 5V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2311\" data-end=\"2354\"\u003e\n\u003ctd data-start=\"2311\" data-end=\"2335\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2313\" data-end=\"2334\"\u003eModule Dimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"2335\" data-end=\"2354\"\u003e32.4mm × 20.4mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2355\" data-end=\"2380\"\u003e\n\u003ctd data-start=\"2355\" data-end=\"2372\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2357\" data-end=\"2371\"\u003eNet Weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"2372\" data-end=\"2380\"\u003e5.2g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr data-start=\"2382\" data-end=\"2385\"\u003e\n\u003ch4 data-start=\"2387\" data-end=\"2407\"\u003ePin Definition\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli data-start=\"2411\" data-end=\"2451\"\u003e\n\u003cstrong data-start=\"2411\" data-end=\"2419\"\u003eVCC:\u003c\/strong\u003e Connect to 5V DC power supply\u003c\/li\u003e\n\u003cli data-start=\"2454\" data-end=\"2482\"\u003e\n\u003cstrong data-start=\"2454\" data-end=\"2462\"\u003eGND:\u003c\/strong\u003e Connect to ground\u003c\/li\u003e\n\u003cli data-start=\"2485\" data-end=\"2550\"\u003e\n\u003cstrong data-start=\"2485\" data-end=\"2492\"\u003eDO:\u003c\/strong\u003e Digital output (TTL signal, connectable to MCU I\/O pin)\u003c\/li\u003e\n\u003cli data-start=\"2553\" data-end=\"2605\"\u003e\n\u003cstrong data-start=\"2553\" data-end=\"2560\"\u003eAO:\u003c\/strong\u003e Analog output (connectable to MCU ADC pin)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2607\" data-end=\"2610\"\u003e\n\u003ch4 data-start=\"2612\" data-end=\"2633\"\u003eImportant Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli data-start=\"2637\" data-end=\"2748\"\u003e\n\u003cstrong data-start=\"2637\" data-end=\"2658\"\u003eWarm-up Required:\u003c\/strong\u003e The sensor needs about \u003cstrong data-start=\"2682\" data-end=\"2710\"\u003e20 seconds of preheating\u003c\/strong\u003e after power-on for stable readings.\u003c\/li\u003e\n\u003cli data-start=\"2751\" data-end=\"2858\"\u003e\n\u003cstrong data-start=\"2751\" data-end=\"2770\"\u003eNormal Heating:\u003c\/strong\u003e The internal heater may cause the sensor to feel warm — this is \u003cstrong data-start=\"2835\" data-end=\"2855\"\u003enormal operation\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":46254049951895,"sku":"21PS001129","price":83.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/files\/mq-3-alcohol-sensor-module-front-view.jpg?v=1762592010","url":"https:\/\/scccltd.com\/en-tw\/products\/mq-3-alcohol-sensor-module","provider":"Sun Cheong Computer Company Limited","version":"1.0","type":"link"}