Spike's hit reality TV show Bar Rescue recently featured a tool many bar owners know well and use regularly--the BACtrack S80.
For those unfamiliar, the show stars Jon Taffer, a long-time food & beverage industry consultant specializing in nightclubs and pubs. As he travels the country offering his professional expertise, he aids failing bars to clean up their act, renovate their facilities, and moderate their staff.
In the following clip, we see Taffer using a piece of police technology to determine how drunk a bar employee is. With the aid of his BACtrack, he's able to accurately quantify her alcohol level--and finds it way over the legal limit--0.21%.