Breathalyzer

Breathalyzer (chiefly US) trademark
or British Breathalyser /ˈbrɛθəˌlaɪzɚ/
Breathalyzer (chiefly US)
trademark
or British Breathalyser /ˈbrɛθəˌlaɪzɚ/
Britannica Dictionary definition of BREATHALYZER
— used for a device that police use to test someone's breath in order to measure how much alcohol is in that person's blood