High Quality Content by WIKIPEDIA articles! A breathalyzer or breathalyser is a device for estimating blood alcohol content from a breath sample. Breathalyzer is the brand name of a series of models made by one manufacturer of these instruments, but has become a genericized trademark for all such instruments. In Canada, a preliminary non-evidentiary screening device can be approved by Parliament as an approved screening device, and an evidentiary breath instrument can be similarly designated as an approved instrument.

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