Which device measures alcohol content in the operator’s breath and connects to a vehicle's ignition system?

The device that measures alcohol content in a person's breath and connects to a vehicle's ignition system is known as an ignition interlock. It is designed to prevent a vehicle from starting if the operator has been drinking alcohol. When the driver breathes into the device, it analyzes the breath sample for alcohol concentration. If it detects a level above a pre-set limit, the ignition interlock system will disable the vehicle, ensuring that the driver cannot operate it while impaired.

This technology is often used as part of court-ordered programs for individuals who have been convicted of driving under the influence (DUI) offenses, helping to promote safer driving practices and prevent repeat offenses. The other options listed do not serve the same purpose or function in connection with vehicle ignition systems.