Why not install a sight gauge on the side of the hydrogen dry cell reservoir so I can tell when it needs water?
For two reasons: First, you’d probably never see it. Have you seen where you are going to install the hydrogen dry cell and reservoir? In most engine compartment there are very few places to squeeze in the hydrogen dry cell and reservoir, and when you get it down into the spot where you can fit it, there is little chance you’ll be able to read a sight gauge on the side of it. Secondly, a sight gauge is just another thing that will break while you’re cramming the hydrogen dry cell and reservoir down into that tight spot, and it is just a place that will leak out your electrolyte. You already know when you need water, whenever you are under the hood checking your oil; you need to top off your water level. These only needs to be done every two tanks full of fuel but you could just do it every time you fill your tank.
