The easiest way to pass a breathalyzer, of course, is to not land in such a situation. Simply don't drink so much that your blood alcohol concentration exceeds the legal limit! However, if we want to approach the question of how to pass a breathalyzer in a hypothetical scenario, there...
What was needed was a way to measure something related to BAC without invading a suspect's body. In the 1940s, breath alcohol testing devices were first developed for use by police. In 1954, Dr. Robert Borkenstein of the Indiana State Police invented the Breathalyzer, one type of breath ...
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When you blow into your ignition interlock, the device will analyze your sample to determine your breath alcohol concentration (BrAC). If your sample is within your state’s legal limits, the screen will display your BrAC or a pass, warning or failed message, depending on your state’s requi...
Some CSIs only work in the field — they collect the evidence and then pass it to the forensics lab. In this case, the CSI must still possess a good understanding of forensic science in order to recognize the specific value of various types of evidence in the field. But in many cases,...
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to determine the BAC before these instruments was through blood or urine tests. These methods were both time consuming and expensive. In 1954, the Breathalyzer was invented by Indiana State Policeman Robert Borkenstein. This was a portable, durable type of alcohol testing device that became the ...
Therefore alcohol on your breath is usually not enough evidence, on its own, for a police officer to arrest you for DUI/DWI. Law enforcement make their determination after: observing your speech and demeanor; administering a roadside breathalyzer test (which is usually optional); and scoring you...
Some CSIs only work in the field — they collect the evidence and then pass it to the forensics lab. In this case, the CSI must still possess a good understanding of forensic science in order to recognize the specific value of various types of evidence in the field. But in many cases,...
s where we get a bit technical. Fuel cell sensors use an electrochemical process where any amount of alcohol on your breath reacts with a catalytic electrode. That reaction produces an electric current. The IID measures that current to determine your BAC. The more alcohol on your breath, the...