sorry, that's bullshit back at you. of course, you could always post a pic of your spectacular new invention, but you won't.
in the mean time, here's a "but the earth's not flat" concept that i think you'll have problems with - brakes don't work on "flow", they work on hydrostatic pressure transfer. since there's no "flow", there's no mechanism by which any "flap" can possibly be created.
whoever failed to teach you basic chemistry at high school really did you wrong.
no, it's not pH, it's electro-chemical electrode potential - you're dangling a metal probe into an electrolyte and measuring the potential difference for that metal relative to the [dissimilar] ground electrode.
this is usenet. "trusting" someone that tells you they have credentials rather than bothering to check facts and educate yourself is absolutely insane.