What Is a Car Breathalyzer (Ignition Interlock Device)?
Maine law requires certain OUI offenders to install an ignition interlock device (IID) – a breathalyzer in your car for DUI – before they can legally drive again. This device measures the driver’s blood alcohol concentration (BAC). It prevents the vehicle from starting if alcohol is detected above the preset limit.
An ignition interlock device is a small electronic unit wired into your vehicle’s ignition system. Before you can start the car, you must blow into a mouthpiece. The device analyzes your breath sample for alcohol. If your BAC reads above 0.02% – the standard threshold in Maine – the car will not start.
Southern Maine Criminal Lawyer Blog

