A breathalyser is a device for measuring blood alcohol concentration (BAC) from a breath sample. Breath analysers do not directly measure blood alcohol concentration, which requires the analysis of a blood sample. Instead, they estimate BAC indirectly by measuring the amount of alcohol in the subject’s breath. There are two prevalent and widely accepted breathalyser technologies  in testing instruments – Hand-held field testing devices are generally based on electrochemical platinum fuel cell analysis while desktop analysers generally use infrared spectrophotometer technology, and occasionally …

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