HANWEI ELETRONICS CO.,LTD MQ-303A http://www.hwsensor.com GAS SENSOR MQ-303A for ALCOHOL DETECTION High sensitivity Low power consumption Miniature-size The MQ-303A is a tin dioxide semiconductor gas sensor which has a high sensitivity to alcohol with quick response speed. This model is suitable for alcohol detection such as portable breath alcohol checker or ignition locking system in automobiles. Structure Gas sensitive semiconductor material is a mini bead type and a hea.