Allow me small resume:
- water level in the tank will vary from 0 to 2 m, eg water pressure at the tank bottom will be approximately 0.2 bar;
- level sensor (or differential presure sensor) will be inside the tank;
- tank is pressurized, pressure inside the tank is 10 bar;
- level indication is remote to the tank. Please give the approximate distance. It is necessary to choose how to transfer information on the water level: analog standard current signal, digital wire or wireless transmission.