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• 15:21, 15 April 2026 Jiaxin talk contribs created page Alcohol Sensor Based on Gas-Sensitive Resistive Materials (Created page with "== Introduction == The MQ-3 is a low-cost metal-oxide semiconductor (MOS) gas sensor designed for the detection of alcohol (ethanol) vapor in air. It is widely used in breathalyzers, vehicle safety systems, and environmental monitoring due to its high sensitivity to ethanol and relatively low sensitivity to interfering gases such as benzene and smoke. The sensing material is tin dioxide (SnO₂), an n-type metal-oxide semiconductor. Structurally, the sensor co...")