This is documenting a small project for a local municipal village water system, for a chemical pump speed control. They had a very old control for the chemical pump that died, and they needed a replacement quickly. We sourced all the needed parts the same day and installed the panel.
The project included a variable speed drive that would read an analog output from a water meter, and adjust the speed of the chemical pump motor. Also included a few switches and a potentiometer run the system manually.