Seven plate water ionizers are considered to be mid-range models. They usually have more power than five plate models, and can reach higher pH and ORP levels. These machines usually have longer warranties than five plate machines.

Life Ionizers MXL-7 Enagic Leveluk SD-501 Alkaviva Athena H2 Alka Prime S7 Chanson Miracle M.A.X.
pH Rating 4.0 – 10.8 4.5 – 10.3 4.7 – 10.8 5.0 – 10.4 6.4 – 10.1
ORP Rating -701 -612 -632 -500 -488
Filtration Three (Customized) Filters Single Filter Single filter Single Filter Single Filter
Price $1,997 $3,980 $2,395 $1,697 $2,195
Power 450w 230w 150w 200w 125w
Convertible
Warranty 10 Years (Limited) 5 Years 5 Years (Labor) 7 Years Lifetime (Limited)
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