noun
breathalyzer; alcohol checker
A device for measuring blood alcohol concentration from a breath sample. Wasei-eigo from 'alcohol checker'; the English term 'breathalyzer' is the natural equivalent.
wasei-eigo (Japanese-coined English), from alcohol checker
運転前にアルコールチェッカーで測定した。
I tested myself with a breathalyzer before driving.
Variant with interpunct; less common but still seen.
Wasei-eigo from English 'alcohol checker'. It is wasei.