EBT (Evidential Breath Testing Device)

An approved device used in DOT alcohol testing that measures breath alcohol concentration from a deep-lung air sample.

Key Facts

  • Only approved device for DOT confirmation alcohol testing
  • Must be on the NHTSA Conforming Products List
  • Prints results and assigns unique sequential test number
  • Must be calibrated per manufacturer specifications

An Evidential Breath Testing device (EBT) is the only approved instrument for DOT confirmation alcohol testing under 49 CFR Part 40. EBTs must be on the NHTSA Conforming Products List (CPL) and must: print the results, assign a unique sequential test number to each test, and distinguish between an initial (screening) and confirmation test. Non-evidential screening devices (like saliva tests) may be used for the initial screen, but only an EBT can provide a confirmed result. Devices must be calibrated according to manufacturer specifications.

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