Brew ethanol monitor
Brew ethanol monitor means the monitoring system that you use to measure brew ethanol to demonstrate compliance with this subpart. The monitoring system includes a resistance element used as an ethanol sensor, with the measured resistance proportional to the concentration of ethanol in the brew.
40 CFR § 63.2192
Terms used in this subpart are defined in the Clean Air Act, in 40 CFR 63.2, in the General Provisions of this part ( 63.1 through 63.15), and in this section as follows: