How long after drinking a half pint will an Interlock detect alcohol?

An Interlock device typically detects alcohol within a few minutes after consumption, depending on individual metabolism and the device's calibration. After drinking a half pint of alcohol, it may take around 30 minutes or more for your blood alcohol concentration (BAC) to peak, but the device can potentially register alcohol much sooner. Therefore, it's advisable to wait at least 30 minutes to an hour after drinking before attempting to use the device.