noun
breathalyzer; alcohol detector
A device used to measure alcohol concentration in a person's breath, typically by police or for workplace safety. The cross-referenced term アルコール検知器 is a common synonym.
See also: アルコール検知器
警察官が飲酒検知器で運転手の呼気を調べた。
The police officer checked the driver's breath with a breathalyzer.
Synonym; アルコール検知器 is more general (detects alcohol in air or liquid), while 飲酒検知器 specifically targets drinking-related breath testing.
Compound of 飲酒 (drinking alcohol) + 検知器 (detector).