> I'm inclined to think the serious stuff is all Celsius and SI units and Fahrenheit is used in the social write ups [...] There are two photos in this article

> I'm inclined to think the serious stuff is all Celsius and SI units and Fahrenheit is used in the social write ups [...] There are two photos in this article which show thermometers (search for "Temperature of the "), which clearly are in Fahrenheit (the scale goes from 20 to over 140, which would be from "comfortable room temperature" to "beyond boiling at normal pressure" if it were in Celsius), and both having a printed label "EACH LINE: 2°f" (with lowercase F for some reason) glued below them. So, at least for this water treatment plant, it seems to be using Fahrenheit for the instrumentation.