I have ran out of talent with automated filtration system

So after thinking about it, I realize that I am trying to shoot for something I am not going to hit with those sensors. The accuracy of those sensors are 1%, so it can swing about .7psi at my working pressure. With the yellow threshold at 1.25psi, there is no way they will work. I did find some Honeywell units-

Which have .25% accuracy, so .178 psi swing at aprox working pressure, which is getting closer to what I need.