Interlock devices have become one of the most effective tools for preventing drunk driving. They help reduce repeat DUI offenses and make it safe for other drivers on the road as well. However, using an interlock device can become confusing, especially for first-time users. You may wonder how long after drinking you should use your interlock device.

What Is An Interlock Device?

An interlock device generally comprises a mouthpiece, the device, and a cord connecting to your car’s ignition. Before you can start your engine, the interlock device requires you to blow into it. If your blood alcohol concentration (BAC) measures above the set limit, the device will prevent you from starting your car until you provide a clean sample.

Your interlock device will also perform rolling retests. Therefore, don’t leave the car running when you are running an errand since you don’t want to miss any test and run into problems. Rolling retests are designed so that you can’t use someone else’s breath sample to start your car.

Alcohol and BAC

Blood alcohol concentration (BAC) measures the amount of alcohol in your blood. Alcohol you consume gets broken down at a constant rate, but the BAC reading can vary from person to person. Two people could drink the same drink, but their BAC reading could be entirely different. Your BAC is affected by a variety of environmental and individual factors, such as age, genetics, and body composition. If your liver is damaged or diseased, it will lead to a higher BAC since it cannot metabolize the alcohol in your body.

When Is It Safe to Use Your Interlock Device?

Since the BAC can vary from person to person, it is not easy to answer this question. The truth is that you should use your interlock device when you have no alcohol in your system. The time between consuming a drink and getting a good BAC reading will depend on how much alcohol you have consumed and how fast your body can metabolize it. Typically it takes one hour for your liver to break down one drink completely. Also, if you consume more than one drink, your blood and muscle tissue will store extra alcohol until your liver can absorb it. These factors will greatly influence your BAC readings.

Interlock Device of New Jersey is here to help you get the most appropriate device installed in your vehicle so that your BAC readings are accurate. We have several locations across the state for your convenience. You can also check out our FAQs for more information. Contact us today at 866-739-2367 to get started.