{"id":311,"date":"2025-11-20T19:51:29","date_gmt":"2025-11-20T19:51:29","guid":{"rendered":"https:\/\/hamtechtechnologies.com\/index.php\/product\/mq-3-alcohol-sensor\/"},"modified":"2025-11-30T16:46:54","modified_gmt":"2025-11-30T16:46:54","slug":"mq-3-alcohol-sensor","status":"publish","type":"product","link":"https:\/\/hamtechtechnologies.com\/index.php\/product\/mq-3-alcohol-sensor\/","title":{"rendered":"MQ-3 Alcohol Sensor"},"content":{"rendered":"<p data-start=\"275\" data-end=\"888\">The MQ-3 Alcohol Sensor is designed to sense alcohol vapors with high sensitivity and stability. It is commonly used in breathalyzer projects, vehicle alcohol detection systems, and indoor alcohol monitoring applications.<br data-start=\"496\" data-end=\"499\" \/>The sensor provides both analog and digital outputs and includes an onboard potentiometer to customize the digital detection threshold.<br data-start=\"634\" data-end=\"637\" \/>It is easy to interface with microcontrollers such as Arduino, ESP32, and Raspberry Pi (via an ADC for analog input). The MQ-3 offers fast response time and a wide detection range, making it suitable for real-time alcohol detection and safety systems.<\/p>\n<hr data-start=\"890\" data-end=\"893\" \/>\n<h3 data-start=\"895\" data-end=\"915\"><strong data-start=\"899\" data-end=\"915\">Key Features<\/strong><\/h3>\n<ul data-start=\"917\" data-end=\"1224\">\n<li data-start=\"917\" data-end=\"953\">\n<p data-start=\"919\" data-end=\"953\">Detects alcohol vapors (ethanol)<\/p>\n<\/li>\n<li data-start=\"954\" data-end=\"992\">\n<p data-start=\"956\" data-end=\"992\">High sensitivity and fast response<\/p>\n<\/li>\n<li data-start=\"993\" data-end=\"1028\">\n<p data-start=\"995\" data-end=\"1028\">Analog and digital output modes<\/p>\n<\/li>\n<li data-start=\"1029\" data-end=\"1085\">\n<p data-start=\"1031\" data-end=\"1085\">Adjustable sensitivity through onboard potentiometer<\/p>\n<\/li>\n<li data-start=\"1086\" data-end=\"1131\">\n<p data-start=\"1088\" data-end=\"1131\">Built-in LED indicator for digital alerts<\/p>\n<\/li>\n<li data-start=\"1132\" data-end=\"1177\">\n<p data-start=\"1134\" data-end=\"1177\">Reliable and long-lasting sensing element<\/p>\n<\/li>\n<li data-start=\"1178\" data-end=\"1224\">\n<p data-start=\"1180\" data-end=\"1224\">Compatible with Arduino, ESP32, Raspberry Pi<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"1226\" data-end=\"1229\" \/>\n<h3 data-start=\"1231\" data-end=\"1253\"><strong data-start=\"1235\" data-end=\"1253\">Specifications<\/strong><\/h3>\n<div class=\"_tableContainer_1rjym_1\">\n<div class=\"group _tableWrapper_1rjym_13 flex w-fit flex-col-reverse\" tabindex=\"-1\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"1255\" data-end=\"1617\">\n<thead data-start=\"1255\" data-end=\"1276\">\n<tr data-start=\"1255\" data-end=\"1276\">\n<th data-start=\"1255\" data-end=\"1265\" data-col-size=\"sm\">Feature<\/th>\n<th data-start=\"1265\" data-end=\"1276\" data-col-size=\"sm\">Details<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"1298\" data-end=\"1617\">\n<tr data-start=\"1298\" data-end=\"1327\">\n<td data-start=\"1298\" data-end=\"1318\" data-col-size=\"sm\">Operating Voltage<\/td>\n<td data-start=\"1318\" data-end=\"1327\" data-col-size=\"sm\">5V DC<\/td>\n<\/tr>\n<tr data-start=\"1328\" data-end=\"1379\">\n<td data-start=\"1328\" data-end=\"1346\" data-col-size=\"sm\">Detection Range<\/td>\n<td data-start=\"1346\" data-end=\"1379\" data-col-size=\"sm\">10\u20131000 ppm alcohol (ethanol)<\/td>\n<\/tr>\n<tr data-start=\"1380\" data-end=\"1425\">\n<td data-start=\"1380\" data-end=\"1389\" data-col-size=\"sm\">Output<\/td>\n<td data-start=\"1389\" data-end=\"1425\" data-col-size=\"sm\">Analog voltage, Digital HIGH\/LOW<\/td>\n<\/tr>\n<tr data-start=\"1426\" data-end=\"1465\">\n<td data-start=\"1426\" data-end=\"1440\" data-col-size=\"sm\">Sensitivity<\/td>\n<td data-start=\"1440\" data-end=\"1465\" data-col-size=\"sm\">High to ethanol vapor<\/td>\n<\/tr>\n<tr data-start=\"1466\" data-end=\"1508\">\n<td data-start=\"1466\" data-end=\"1481\" data-col-size=\"sm\">Preheat Time<\/td>\n<td data-start=\"1481\" data-end=\"1508\" data-col-size=\"sm\">24\u201348 hours (first use)<\/td>\n<\/tr>\n<tr data-start=\"1509\" data-end=\"1542\">\n<td data-start=\"1509\" data-end=\"1531\" data-col-size=\"sm\">Current Consumption<\/td>\n<td data-start=\"1531\" data-end=\"1542\" data-col-size=\"sm\">\u2264150 mA<\/td>\n<\/tr>\n<tr data-start=\"1543\" data-end=\"1584\">\n<td data-start=\"1543\" data-end=\"1567\" data-col-size=\"sm\">Operating Temperature<\/td>\n<td data-start=\"1567\" data-end=\"1584\" data-col-size=\"sm\">-10\u00b0C to 50\u00b0C<\/td>\n<\/tr>\n<tr data-start=\"1585\" data-end=\"1617\">\n<td data-start=\"1585\" data-end=\"1598\" data-col-size=\"sm\">Dimensions<\/td>\n<td data-start=\"1598\" data-end=\"1617\" data-col-size=\"sm\">32 \u00d7 20 \u00d7 22 mm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<hr data-start=\"1619\" data-end=\"1622\" \/>\n<h3 data-start=\"1624\" data-end=\"1644\"><strong data-start=\"1628\" data-end=\"1644\">Applications<\/strong><\/h3>\n<ul data-start=\"1646\" data-end=\"1925\">\n<li data-start=\"1646\" data-end=\"1674\">\n<p data-start=\"1648\" data-end=\"1674\">DIY breathalyzer devices<\/p>\n<\/li>\n<li data-start=\"1675\" data-end=\"1732\">\n<p data-start=\"1677\" data-end=\"1732\">Alcohol detection in vehicles (driver safety systems)<\/p>\n<\/li>\n<li data-start=\"1733\" data-end=\"1764\">\n<p data-start=\"1735\" data-end=\"1764\">Workplace safety monitoring<\/p>\n<\/li>\n<li data-start=\"1765\" data-end=\"1829\">\n<p data-start=\"1767\" data-end=\"1829\">Indoor air quality systems involving alcohol vapor detection<\/p>\n<\/li>\n<li data-start=\"1830\" data-end=\"1870\">\n<p data-start=\"1832\" data-end=\"1870\">IoT-based ethanol\/alcohol monitoring<\/p>\n<\/li>\n<li data-start=\"1871\" data-end=\"1925\">\n<p data-start=\"1873\" data-end=\"1925\">Academic and research projects involving gas sensing<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"1927\" data-end=\"1930\" \/>\n<h3 data-start=\"1932\" data-end=\"1968\"><strong data-start=\"1936\" data-end=\"1968\">Compatible Boards \/ Circuits<\/strong><\/h3>\n<ul data-start=\"1970\" data-end=\"2101\">\n<li data-start=\"1970\" data-end=\"1999\">\n<p data-start=\"1972\" data-end=\"1999\">Arduino (Uno, Nano, Mega)<\/p>\n<\/li>\n<li data-start=\"2000\" data-end=\"2019\">\n<p data-start=\"2002\" data-end=\"2019\">ESP32 \/ ESP8266<\/p>\n<\/li>\n<li data-start=\"2020\" data-end=\"2062\">\n<p data-start=\"2022\" data-end=\"2062\">Raspberry Pi (via ADC such as ADS1115)<\/p>\n<\/li>\n<li data-start=\"2063\" data-end=\"2101\">\n<p data-start=\"2065\" data-end=\"2101\">Displays, alarms, and IoT dashboards<\/p>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>The MQ-3 sensor detects alcohol (ethanol vapor) in the air, making it ideal for breath analyzers, alcohol detection systems, and safety monitoring projects.<\/p>\n","protected":false},"featured_media":592,"comment_status":"open","ping_status":"closed","template":"","meta":{"postBodyCss":"","postBodyMargin":[],"postBodyPadding":[],"postBodyBackground":{"backgroundType":"classic","gradient":""}},"product_brand":[],"product_cat":[353,145,420,356,403],"product_tag":[219,218,217],"class_list":{"0":"post-311","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-accessories","7":"product_cat-analog-electronics","8":"product_cat-diy-electronics","9":"product_cat-electronics-components","10":"product_cat-modules-sensors","11":"product_tag-alcohol","12":"product_tag-mq-3","13":"product_tag-sensor","15":"first","16":"instock","17":"taxable","18":"shipping-taxable","19":"purchasable","20":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/hamtechtechnologies.com\/index.php\/wp-json\/wp\/v2\/product\/311","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hamtechtechnologies.com\/index.php\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/hamtechtechnologies.com\/index.php\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/hamtechtechnologies.com\/index.php\/wp-json\/wp\/v2\/comments?post=311"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hamtechtechnologies.com\/index.php\/wp-json\/wp\/v2\/media\/592"}],"wp:attachment":[{"href":"https:\/\/hamtechtechnologies.com\/index.php\/wp-json\/wp\/v2\/media?parent=311"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/hamtechtechnologies.com\/index.php\/wp-json\/wp\/v2\/product_brand?post=311"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/hamtechtechnologies.com\/index.php\/wp-json\/wp\/v2\/product_cat?post=311"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/hamtechtechnologies.com\/index.php\/wp-json\/wp\/v2\/product_tag?post=311"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}