A breath analyzer is a small, portable device used to measure the blood alcohol concentration (BAC) in suspected drunk drivers.  Blood alcohol is the concentration of alcohol in a person’s blood. Police officers often use these devices as they are used in the field to detect whether a driver is over the legal limit for alcohol. A Breathalyzer is a the brand name of one such type of device developed by Robert Frank Borkenstein, but many now use the name of the device to refer