What device is indicated by the acronym PBT?

The acronym PBT stands for Portable Breathalyzer, which is a device used primarily by law enforcement to measure a person's blood alcohol content through their breath. This device works by using a chemical reaction to analyze the breath sample provided by an individual. The PBT is particularly useful for officers in the field, allowing them to quickly assess whether a driver is under the influence of alcohol without needing more extensive lab tests. This immediate analysis can assist in making informed decisions about sobriety checks and potential arrests.

Understanding the context around the other choices helps clarify why Portable Breathalyzer is the appropriate answer. While personal body temperature may relate to medical monitoring, it does not involve a portable device that assesses alcohol consumption. A police backup team refers to a group of officers available for support during an incident, which does not pertain to the function of a device. The public barrier tower, although possibly related to safety or crowd control, does not relate to alcohol measurement. Thus, the accurate fit of PBT as Portable Breathalyzer emerges clearly because it directly relates to a recognized function and role within law enforcement.