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2023-06-25 0 Views

The principle and function of the breathalyzer

When an N-type oxide is exposed to the atmosphere, it decreases the number of electrons it contains and increases its resistance due to the adsorption of oxygen. OAoTextile Testing Instruments, Testing Equipment Manufacturer


Subsequently, when a certain reducing gas is in the atmosphere, it reacts with the adsorbed oxygen, increasing the number of electrons in the oxide, resulting in a decrease in the resistance of the oxide. The semiconductor oxide sensor analyzes the gas concentration by changing the resistance value. OAoTextile Testing Instruments, Testing Equipment Manufacturer


The Breathalyzer actually consists of an alcohol gas sensor (equivalent to a rheostat that changes with the concentration of alcohol gas), a fixed value resistor, and a voltmeter or ammeter. OAoTextile Testing Instruments, Testing Equipment Manufacturer


R1 is a fixed value resistor. The resistance value of the alcohol gas sensor R2 decreases as the alcohol gas concentration increases. If the concentration of alcohol gas exhaled by the driver is greater, the Tester The voltage indicates the larger the number. OAoTextile Testing Instruments, Testing Equipment Manufacturer


Take the breathalyzer: if the alcohol content in the driver's exhaled breath exceeds the prescribed limit, the instrument's vibration motor will vibrate and the indicator light will flash. OAoTextile Testing Instruments, Testing Equipment Manufacturer


In addition, this traffic police breathalyzer has a very high sensitivity. The detection efficiency is extremely high and the result can be obtained within 1 second. OAoTextile Testing Instruments, Testing Equipment Manufacturer


The instrument can also store 80,000 test records including date, time, temperature and alcohol concentration. It is the best choice for continuous testing by multiple people. The driver does not have to wait for a continuous inspection, saving time and effort. OAoTextile Testing Instruments, Testing Equipment Manufacturer

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