"Breath alcohol" refers to the amount of alcohol present in a person's breath. It is commonly measured using a breathalyzer device to determine if someone has been drinking alcohol. Full definition
However, as the extent of alcohol abuse in society became more recognized, other markets for breath alcohol testing products developed — most notably in the industrial occupational health sector. (intox.com)
All of the breath collection devices were designed to measure breath alcohol concentrations that were related back to blood alcohol concentrations. (intox.com)
You determine breath alcohol levels by passing a narrow band of IR light, selected for its absorption by alcohol, through one side of a breath sample chamber. (intox.com)