MQ3 Gas Sensor has High sensitivity to alcohol and small sensitivity to Benzene . MQ3 Gas Sensor has Fast response and High sensitivity . MQ3 Gas Sensor is Stable and has long life . It has Simple drive circuit application. They are suitable for alcohol checker, Breathalyser. It is a durable sensor and a product of premium quality. The materials used in its construction are of high end. This materials Product is sourced from various locations based on the needs of the customer.