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Understanding Breath Tests

Breathalyzer Tests are Conducted Using a Datamaster DMT in South Carolina

A breath alcohol testing device (DataMaster DMT) estimates blood alcohol content by calculating the percentage of alcohol exhaled from the lungs.

How Can a Datamaster DMT Measure Blood Alcohol?

The blood releases alcohol through the breath. When you drink alcohol, the body absorbs it quite literally. It saturates tissue lining in the mouth, throat, stomach and intestines, and enters the bloodstream. When that blood circulates through the lungs, alcohol evaporates out through air sacs in the lungs. A breath test measures the alcohol in the breath that is exhaled.

There’s a mathematical relationship between alcohol blood level and alcohol breath level. It was determined that the alcohol measured in the breath can tell you something about the overall alcohol content in the bloodstream. A “universal” relationship was determined between the two levels alcohol concentrations (despite the fact that each person is unique). The golden rule of breath testing says: Every 2,100 ml of air in the lungs (breath to be exhaled) will contain the same amount of alcohol concentration as 1 ml of blood.

A device that can measure alcohol in the breath, can then estimate alcohol in the blood. Breath testing devices use special technology to calculate the amount of air expelled, the amount of alcohol in that air and then calculate a blood alcohol level based on the ratio above. In South Carolina, the only permissible breath testing device is the DataMaster (DMT), which uses infrared technology to measure the alcohol content in the breath.

Are Breath Test Results Admissible in Court?

Results from the Datamaster, DMT, are admissable as evidence in a driving under the influence charge if proper protocol for administering the test was followed, and you were advised of your rights.

Hire a DUI Lawyer to Challenge Your Breath Test

Criminal defense lawyers at the Strom Law Firm, LLC provide a free consultation to discuss the facts of a DUI case. Founded by a former U.S. Attorney, the team at Strom Law also includes a former Public Defender. It’s awarded the highest Martindale-Hubble ranking and collectively holds more than 50 years of complex litigation experience.

Trackbacks

  1. […] Field sobriety tests (FSTs) were created to help law enforcement gauge the relative sobriety or intoxication of a driver, and cannot be used to determine blood alcohol level. However, a police officer who has pulled a suspicious motorist or who is working a sobriety checkpoint can request a battery of field sobriety tests which will likely then provide the officer with probable cause for an arrest and the use of an evidentiary alcohol test. […]

  2. […] you are pulled over for a suspected DUI, you may be subjected to a field sobriety test or a Breathalyzer test. These tests must be videotaped by the police officer, and the officer must inform you of […]

  3. […] Field sobriety tests (FSTs) were created to help law enforcement gauge the relative sobriety or intoxication of a driver, and cannot be used to determine blood alcohol level. However, a police officer who has pulled a suspicious motorist or who is working a sobriety checkpoint can request a battery of field sobriety tests which will likely then provide the officer with probable cause for an arrest and the use of an evidentiary alcohol test. […]

  4. […] South Carolina, “a breathalyzer” actually refers to a DataMaster unit, which measures blood alcohol via infrared wave readings of […]

  5. […] If you are pulled over for a suspected DUI, you may be subjected to a field sobriety test or a Breathalyzer test. These tests must be videotaped by the police officer, and the officer must inform you of […]

  6. […] you are pulled over for a suspected DUI, you may be subjected to a field sobriety test or a Breathalyzer test. These tests must be videotaped by the police officer, and the officer must inform you of […]

  7. […] Field sobriety tests (FSTs) were created to help law enforcement gauge the relative sobriety or intoxication of a driver, and cannot be used to determine blood alcohol level. However, a police officer who has pulled a suspicious motorist or who is working a sobriety checkpoint can request a battery of field sobriety tests in determining probable cause of an arrest and the use of an evidentiary alcohol test. […]

  8. […] you are pulled over for a suspected DUI, you may be subjected to a field sobriety test or a Breathalyzer test. These tests must be videotaped by the police officer, and the officer must inform you of […]

  9. […] Washington took her 2002 case to the Washington Supreme Court citing the unreliable nature of the Breathalyzers, specifically the thermometer used in the breath […]

  10. […] Washington took her 2002 case to the Washington Supreme Court citing the unreliable nature of the Breathalyzers, specifically the thermometer used in the breath […]

  11. […] content (BAC) through a breath reading. South Carolina police officers are required to film all DWI and DUI stops, and ensure that the suspect is visible in their film, especially during field sobriety tests […]

  12. […] question as to the reliability of breathalyzers has become a topic of great debate. Breathalyzers, or breath analysis, are one of the tools most commonly used by law enforcement to determine if […]

  13. […] question as to the reliability of breathalyzers has become a topic of great debate. Breathalyzers, or breath analysis, are one of the tools most commonly used by law enforcement to determine if […]

  14. […] question as to the reliability of breathalyzers has become a topic of great debate. Breathalyzers, or breath analysis, are one of the tools most commonly used by law enforcement to determine if […]

  15. […] you are pulled over for a suspected DUI, you may be subjected to a field sobriety test or a Breathalyzer test. These tests must be videotaped by the police officer, and the officer must inform you of […]

  16. […] videotape must document that the breathalyzer was conducted within three (3) hours of being pulled for driving under the influence or the […]

  17. […] Carolina law enforcement officers use a DataMaster Breath test, which is a desktop device, as admissible court evidence that a suspect committed DUI. In order to […]

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