Introduction: Operating a vehicle while intoxicated (DUI) is a grave infraction that carries significant penalties. Advanced testing techniques are used by law enforcement to assess the degree of impairment in those who are suspected of driving while intoxicated. 
Breathalyzers: Often referred to as breath alcohol testers, breathalyzers work by oxidizing ethanol. Alcohol causes the bloodstream's ethanol to be absorbed into the lungs of the drinker. A tiny amount of this ethanol is released into their breath as they breathe. This breath sample is used by breathalyzers to determine the blood alcohol content (BAC). An electrical current is produced by the device's sensor when it comes into contact with alcohol molecules. The device can reliably provide a blood alcohol content (BAC) reading since the current's size is proportionate to the alcohol concentration.
Blood Tests: To ascertain the amount of alcohol or other intoxicating chemicals in a blood sample, blood tests are used in DUI investigations. Blood tests offer a direct measurement of the chemicals in the bloodstream, in contrast to breathalyzers that estimate blood alcohol content (BAC) indirectly. As a percentage of alcohol in the blood, the most widely used statistic is called blood alcohol content (BAC). Blood tests are considered highly accurate and are often used as evidence in legal proceedings. However, the process is more invasive, requiring a qualified professional to draw blood, making it less practical for roadside testing.

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