LABORATORY TESTING OF TWO PROTOTYPE IN-VEHICLE BREATH TEST DEVICES. TECHNICAL REPORT

The results are presented of in-vehicle breath test devices designed to prevent persons with alcohol on their breath from driving a car: Soberlizer and the Alcohol Breath Ingition Controller (A.B.I.C.). In addition to alcohol sensors, these devices have features built into them to check if the sample being introduced is a true breath sample. The Soberlizer has a temperature sensor desinged to check whether the sample being introduced is the same temperature as a human breath. The A.B.I.C. has a pressure switch designed to check whether the force activating the system is as strong as a human breath. The research has shown that substitute breath samples could be introduced into either in-vehicle device to fool the system. In the case of the Soberlizer, alcohol could also be easily filtered out of breath samples before they are blown into the device to fool the system. Strategies that filter alcohol from breath samples could not be tested on the A.B.I.C. because available equipment could not produce enough pressure to activate the A.B.I.C. pressure switch.

Media Info

  • Pagination: 19 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00492215
  • Record Type: Publication
  • Source Agency: National Highway Traffic Safety Administration
  • Report/Paper Numbers: NRD-42, HS-806 821
  • Files: HSL, NTL, USDOT
  • Created Date: Mar 31 1990 12:00AM