The alcohol detector is mainly used to detect whether the human body has alcohol and intake. It is often used in traffic law enforcement to detect whether drunk driving and some high-risk prohibited areas are on-the-job detection. In theory, it is the most accurate way to detect the alcohol content in human blood, but due to the limitation of the situation, the alcohol consumption is usually indirectly determined by detecting the alcohol content in the human breath. Therefore, it is necessary to separately measure the amount of alcohol and expiratory volume when performing the test. Using a pressure sensor to measure the amount of wind pressure when a person blows is a common way to measure the amount of breathing. In daily life, we know that when the gas flows, it will produce a corresponding wind pressure. The magnitude of the wind pressure is closely related to the gas density and flow velocity by Bernoulli's equation. Therefore, for the same gas, different flow rates correspond to different wind pressures. In the alcohol detector, the pressure sensor is used to measure the pressure in the vent pipe when the human body exhales, and the flow rate of the gas in the detector can be obtained first; then, the diameter of the pipe can be used to calculate the flow rate of the gas during the test. After measuring the alcohol content in other parts of the alcohol detector, the amount of exhaled air is measured according to the pressure sensor, and finally the concentration of alcohol in the exhaled gas is obtained. Thereby, the drinking status of the person to be tested can be judged. The Honeywell TruStability TSC Series is a piezoresistive silicon pressure sensor that provides a proportional analog output that provides pressure readings over a specified full-scale pressure span and temperature range. The differential pressure sensor measures pressure between two pressure ports. The gauge pressure sensor is based on atmospheric pressure and provides an output value proportional to the difference in atmospheric pressure. Static Frequency Connerter With Singlephase Output 50Hz To 60Hz Converter,50Hz To 60Hz Frequency Converter,Single Phase Frequency Converter,Frequency Converter 50Hz To 60Hz Single Phase Jinan Xinyuhua Energy Technology Co.,Ltd , https://www.xyhenergy.com