Alcohol testing apparatus, not for medical purposes

units for analyzing or detecting substances in liquid or gases; alcohol and [ drug testing units; electronic calculators ] for estimating liquid or gas analysis;[ control circuits for use in connection with motor vehicles; units for sensing presence or movenment of human beings; electrical or electronic controllers; electronic alarms and gates ], all for controlling the movement of human beings and/or motor vehicles; [ microphones ] and audio signal processing units; and component parts for t...