Wisconsin Department of Transportation

Alert: The following services will be unavailable on Saturday, January 5, 2013 from 12 a.m. (midnight) to 6 a.m. CST due to system maintenance.

Photo gallery: Chemical testing

What's on your breath?

The State Patrol purchased its first Breathalyzers in the mid-1950s to measure driversí alcohol content. Today, the Chemical Testing Section maintains and certifies evidential breath alcohol testing instruments, trains and certifies instrument operators and provides expert testimony in court on breath alcohol and instrumentation issues. The program is also responsible for the approval of ignition interlock devices and preliminary breath testing devices (PBTs) as well as PBT operator certification and repair.

  An early model Breathalyzer  Demonstrating equipment in 1959

A preliminary breath testing device (PBT)



Questions about the content of this page:
Steve Olson, steve.olson@dot.wi.gov
Last modified: January 29, 2014

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