| Aspect | Breathalyzer | Field Sobriety Test Technician |
|---|
| Required Credentials | Typically certified in device operation and calibration | Certified in administering and evaluating sobriety tests |
| Work Environment | Laboratory or roadside settings | On-site at accident scenes or law enforcement locations |
| Industry Usage | Used by law enforcement to measure blood alcohol content (BAC) | Assists law enforcement in assessing impairment through physical tests |
While a Breathalyzer measures BAC directly using a chemical analysis device, a Field Sobriety Test Technician conducts physical assessments to evaluate impairment. Both roles support law enforcement but serve different functions in DUI investigations.