What are BAIIDs?
A breath alcohol ignition interlock device (BAIID) is a switch that is attached to the ignition of a motor vehicle. BAIIDs include a handset with a mouthpiece for sampling, a mounted camera, a cellular modem for wireless reporting of results, and a control unit which is installed under the vehicle dash.
How do BAIIDs work?
BAIIDs use alcohol-specific sensors to detect and quantify the concentration of alcohol in the user’s breath. When provided with a breath sample with an alcohol concentration that is below the set point of 0.020 g/210L, the BAIID will unlock the ignition and allow the vehicle to be operated. If a breath alcohol sample is above the set point, the user will be prevented from unlocking the ignition and operating the vehicle.
When are BAIIDs required?
The installation of a BAIID is required for:
- Repeat OWI offenders
- First time OWI offenders with an alcohol concentration of 0.15% or higher
- Drivers who refuse to provide a breath or blood sample for a chemical test at a traffic stop
Visit the vendor websites to learn more about operation and installation of each BAIID.
For questions about BAIIDs, contact the Chemical Test Section at