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) |
| Recommended by Nu Tech Water: | ✔ | — | — | ✔ | — |