Breath analyzers are devices used to measure the concentration of specific substances in a person's breath. They are commonly used to detect alcohol levels, helping law enforcement and individuals assess sobriety. The device works by having a person exhale into it, and it analyzes the breath sample for chemical compounds. In addition to alcohol detection, breath analyzers can also be used for medical purposes, such as monitoring diabetes through the detection of acetone in breath. These devices are becoming increasingly sophisticated, with some models capable of providing real-time results and connecting to smartphones for data tracking.