{"product_id":"mq-3-alcohol-gas-sensor-module-for-breath-analyzer-projects","title":"MQ-3 Alcohol Gas Sensor Module for Breath Analyzer Projects","description":"\u003ch1\u003eMQ-3 Alcohol Gas Sensor Module – High Sensitivity for Breathalyzers\u003c\/h1\u003e\u003cp\u003eThe MQ-3 gas sensor module detects alcohol vapors with high sensitivity and fast response. It is commonly used in breathalyzer projects, alcohol detection systems, and environmental monitoring. The module provides a convenient analog output that can be read by microcontrollers like Arduino.\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\u003eDetection Gas\u003c\/td\u003e\n\u003ctd\u003eAlcohol (Ethanol)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDetection Range\u003c\/td\u003e\n\u003ctd\u003e0.05 – 10 mg\/L\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\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003eAnalog (0–5V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eApprox. 32 x 22 x 27 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeating Resistance\u003c\/td\u003e\n\u003ctd\u003e33Ω ± 10%\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\u003eDIY breathalyzer with LCD display\u003c\/li\u003e\n\u003cli\u003eAlcohol detection alarm for vehicles\u003c\/li\u003e\n\u003cli\u003ePortable alcohol tester with microcontroller\u003c\/li\u003e\n\u003cli\u003eSmart IoT alcohol monitoring system\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eWorks with any microcontroller that supports analog input, such as Arduino Uno, ESP32, ESP8266, and Raspberry Pi. Operates at 5V logic level, but can be used with 3.3V boards by using a level shifter for analog output.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eConnect VCC to 5V, GND to ground, and AOUT to an analog input pin. Allow a preheat time of about 1-2 minutes for stable readings. Use the on-board potentiometer to adjust the threshold for digital output (DOUT) if needed.\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?\u003c\/summary\u003e\u003cp\u003eYes, the MQ-3 sensor module works directly with Arduino boards. Connect the analog output to any analog pin and power with 5V from the Arduino.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan it detect other gases like smoke?\u003c\/summary\u003e\u003cp\u003eThe MQ-3 has high selectivity for alcohol and low sensitivity to smoke and gasoline, making it ideal for alcohol-specific detection.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat is the preheat time required?\u003c\/summary\u003e\u003cp\u003eThe sensor requires about 1-2 minutes of preheating to give stable readings. This is normal for metal oxide semiconductor sensors.\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":53445025497453,"sku":"CDN-0779","price":120.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_fd4e6b84-b8a5-4717-88b8-ef45cd720c9f.jpg?v=1781512934","url":"https:\/\/compoden.com\/products\/mq-3-alcohol-gas-sensor-module-for-breath-analyzer-projects","provider":"Compoden","version":"1.0","type":"link"}