Look, this is a ridiculous idea. I'm completely aware. However, I'd like to know which sensors to put in, and where in the coolant tubes or so to put them. It doesn't have to be a permanent setup.

I just want to show someone the pressure and coolant flow. Then, I want to cut the lower coolant tube and put in one of those coolant heaters that heat up engine coolant during the winter time. Cue the pressure and flow test again.