Wisconsin Administrative Code
Department of Agriculture, Trade and Consumer Protection
ATCP 90-139 - Trade and Consumer Protection
Chapter ATCP 92 - Weights And Measures
Subchapter V - Liquefied Petroleum Gas
Section ATCP 92.40 - Thermometer and thermometer well specifications

(1) Every meter used for the liquid measurement of liquefied petroleum gas sold or delivered to consumers shall be equipped with a thermometer well. The well shall extend into the flowing liquid either in the liquid chamber of the meter or in the meter inlet or discharge line immediately adjacent to the meter.

(2) The thermometer well shall be constructed so as to permit insertion of a Fahrenheit thermometer which has one-degree graduations, spaced at least 0.04 inch apart.