Water Ionizers with Solid plate delivers an electrical current to the water through an array of positively and negatively charged Platinum coated Titanium plates.
The more the water passes in and out of the Titanium Mesh system and the greater the electrical charge to the water (especially when powered by the newer SMPS power systems) - the higher the pH (potential of Hydrogen) and the ORP (Oxidation-Reduction Potential) of the drinking water.