What's An Alco-Sensor?
You blew into an Alco-Sensor. Alco-Sensors are devices that test breath samples for the presence of alcohol. As the Georgia Court of Appeals in Keenan v. State, 263 Ga. 569, 436 S.E.2d 475 (1993) stated, Alco-Sensor results are not used as evidence of the amount of alcohol in a person’s blood. Rather, the Alco-Sensor is used as an initial screening device by law enforcement in determining probable cause to make a DUI arrest. The arresting officer may testify only to the general result of the test, that is, only whether the test was “positive” or “negative” for alcohol. So, yes, the test can be used against you, but not for the specific numerical result of the test. The officer can, however, testify that you tested positive for alcohol.