An alcohol sensor, also known as an alcohol detector or breathalyzer, is a device used to detect the presence and concentration of alcohol vapor in the air or in a person's breath. The operation of alcohol sensors typically relies on one of several detection principles, including semiconductor oxide sensors, fuel cell sensors, infrared spectroscopy, and electrochemical sensors. Each type of sensor has its own advantages and limitations in terms of sensitivity, accuracy, response time, and cost. Calibration and periodic maintenance are important to ensure the accuracy and reliability of alcohol sensors.
