Electrode plates: 7 Solid Large Platinum Dipped Titanium

-ORP Range: -375 / -625

pH Range: 2.5 to -11.5

Warranty: 5 years

Plate Surface Area: 490 sq. in.

The SD-501U is a newly released Under The Counter Model for those who prefer to have their machine hidden away. This model is the same as the SD501 as far as all of the bells and whistles including the high acid and high Kangen alkaline water.