The LeveLuk SD501DX and LeveLuk K8 are both designed for residential use, but they are positioned differently within the Kangen Water machine lineup.

The SD501DX is a residential model suited to regular family use, while the K8 is the premium residential model for buyers who want a higher-end configuration.

Both machines are fully automatic, produce five types of water, have the same listed water production rates, support universal power input, and come with a five-year warranty.

The main differences are the number of electrode plates, listed negative ORP, and user interface.

The SD501DX has 7 titanium electrode plates and simple physical buttons, while the K8 has 8 electrode plates and a touchscreen.

The K8 also has a more negative listed ORP of approximately -722 mV, compared with approximately -631 mV for the SD501DX.

*Actual ORP can vary depending on water quality, incoming water conditions, and flow rate.

The Simple Answer

If you are looking for a reliable residential Kangen Water machine for regular family use, the SD501DX is a strong choice.

If you want the premium residential model, particularly because you value the additional electrode plate, more negative listed ORP, and touchscreen interface, the K8 is the step-up option.

The K8 does not have a higher listed water production rate than the SD501DX. Both are listed at 4.5–7.6 L/min for Kangen Water.

The main difference is therefore not water output. It is the electrode configuration, listed ORP, interface, and overall positioning.

Both models also feature universal power input, making them suitable for use in countries with different electrical voltage standards. This can be particularly useful for international buyers or people who move between countries.

Local plug, outlet, grounding, and electrical requirements should still be checked before installation and use.

*ORP values may vary depending on water quality, incoming water conditions, and flow rate.

Both models are designed for residential use, so the main differences are their electrode configuration, interface, listed ORP, and overall positioning within the lineup.

The easiest way to understand these two models is:

SD501DX → Residential + Regular Family Use

K8 → Premium Residential + 8 Plates + More Negative Listed ORP + Touchscreen

The SD501DX already provides a strong residential configuration with 7 electrode plates, approximately -631 mV listed negative ORP, voice guidance, automatic operation, universal power input, and a five-year warranty.

The K8 builds on that residential configuration with an additional electrode plate, approximately -722 mV listed negative ORP, a touchscreen interface, and universal power input.

One of the main hardware differences is the number of electrode plates.

The SD501DX uses 7 titanium electrode plates, while the K8 uses 8 electrode plates.

Both models use the same listed plate size:

135 × 75 mm

The additional electrode plate is one of the characteristics that distinguishes the K8 from the SD501DX and is relevant when comparing their listed ORP specifications.

However, having 8 plates does not mean that the K8 has a higher listed water production rate.

Both models have the same listed production rates.

For buyers who pay attention to ORP, this is one of the most important differences between the two models.

The SD501DX is listed at approximately -631 mV, while the K8 is listed at approximately -722 mV.

The K8 therefore has a more negative listed ORP than the SD501DX.

ORP, or oxidation-reduction potential, describes the electron-transfer characteristics of a solution. Negative ORP is commonly discussed in relation to the reducing characteristics of electrolyzed water and its antioxidant properties.

For buyers who specifically prioritize the negative ORP characteristics of electrolyzed water, the K8's approximately -722 mV listed ORP is an important distinction.

However, ORP is not a fixed number in every household. Actual readings can vary depending on water quality, incoming water conditions, and flow rate.

The listed ORP figures should therefore be understood as specifications under specified conditions, rather than guaranteed readings during every use.

The SD501DX is positioned as the standard residential model in this comparison.

It is particularly suitable for a regular family that wants a capable Kangen Water machine without necessarily needing the premium features of the K8.

The SD501DX offers:

• 7 titanium electrode plates
• Approximately -631 mV listed negative ORP
• 4.5–7.6 L/min listed Kangen Water production
• Simple physical button controls
• LCD display
• Voice guidance
• Universal power input
• Five types of water
• Fully automatic operation
• 5-year warranty

For many households, this provides a very complete residential configuration.

The SD501DX should not be viewed as a basic or entry-level machine. It is the regular residential choice, while the K8 sits above it as the premium residential option.

The K8 is the premium residential model.

Its premium positioning comes from several characteristics rather than from higher water output.

The K8 offers:

• 8 electrode plates
• Approximately -722 mV listed negative ORP
• Touchscreen interface
• Voice guidance
• Universal power input
• Five types of water
• Fully automatic operation
• 4.5–7.6 L/min listed Kangen Water production
• 5-year warranty

The K8 is therefore particularly appealing to buyers who want the higher-end residential configuration and place importance on the additional electrode plate, more negative listed ORP, and touchscreen experience.

Both the SD501DX and K8 feature universal power input.

This means the machines are designed to accommodate different electrical voltage standards, making these two models particularly convenient for international use.

This can be useful if you:

• Live outside the United States
• Purchase a machine for use in another country
• Move between countries
• Live in a country with a different standard voltage

For international buyers, this is an important practical advantage.

However, universal power input does not necessarily mean that every part of the electrical installation is identical worldwide. The appropriate plug, outlet, grounding, frequency, and local electrical requirements should still be checked before installation and use.

The universal power input is therefore best understood as a feature that provides greater flexibility across different voltage standards.

The user interface is another easy difference to understand.

SD501DX: Physical Buttons

The SD501DX uses simple physical buttons together with an LCD display.

The controls are straightforward and designed for everyday operation.

The SD501DX also provides voice guidance. For example, when selecting Kangen Water at pH 9.5, the machine can verbally announce the selected setting in addition to the normal button confirmation.

K8: Touchscreen

The K8 uses a touchscreen interface.

This gives the K8 a more modern control experience and contributes to its premium residential positioning.

In simple terms:

SD501DX → Simple physical buttons

K8 → Touchscreen

Both machines are fully automatic.

Voice Guidance

Both the SD501DX and K8 provide voice guidance in 8 languages, although the available languages are different.

SD501DX

• Japanese
• English
• French
• German
• Chinese
• Vietnamese
• Spanish
• Portuguese

K8

• Japanese
• English
• Spanish
• French
• Italian
• German
• Portuguese
• Chinese

Both models therefore provide eight-language voice guidance.

The main difference is that the SD501DX includes Vietnamese, while the K8 includes Italian.

This is an important point because it is easy to assume that the K8 produces more water because it has an additional electrode plate.

Based on the listed specifications, the production rates are the same.

Therefore, water production is not a reason to choose the K8 over the SD501DX based on the listed specifications.

The distinction between the two models is more about their electrode configuration, listed ORP, user interface, and overall positioning.

Production rates are listed specifications under particular operating conditions and may vary depending on incoming water conditions and other factors.

Both the SD501DX and K8 are designed as countertop residential machines.

This makes their installation approach fundamentally similar. Neither requires the type of permanent under-counter installation associated with the SD501U.

For buyers deciding specifically between the SD501DX and K8, installation style therefore does not usually need to be the deciding factor.

The more relevant considerations are capacity, interface, technical specifications, features, and budget.

The two machines have different dimensions.

SD501DX

264 × 338 × 171 mm

K8

279 × 345 × 147 mm

The K8 is wider and taller but shallower, while the SD501DX is narrower and deeper.

Because countertop layouts differ, it is best to check the available space rather than assuming one machine will fit better in every kitchen.

Interestingly, the K8 is listed as slightly lighter than the SD501DX.

There is no meaningful difference in these two specifications.

Both models are listed at 230 W and both come with a 5-year warranty.

Therefore, neither power rating nor warranty duration should be the deciding factor between these two models.

For a regular family looking for a residential Kangen Water machine, the SD501DX is generally the more straightforward choice.

It already provides:

• 7 electrode plates
• Approximately -631 mV listed negative ORP
• High listed Kangen Water production
• Voice guidance
• Universal power input
• Fully automatic operation
• 5-year warranty

If you do not specifically need the K8's premium features, the SD501DX may provide everything you are looking for in a residential machine.

The SD501DX may be the better fit if you:

• Have a regular family household
• Want a capable residential Kangen Water machine
• Prefer simple physical buttons
• Want 7 electrode plates
• Want approximately -631 mV listed negative ORP
• Want voice guidance
• Need universal power input for international use
• Do not specifically need a touchscreen
• Want a strong balance of residential features

The SD501DX is a practical choice for buyers who want a capable residential machine without specifically moving to the premium model.

The K8 may be the better fit if you:

• Want the premium residential model
• Want 8 electrode plates
• Specifically prioritize a more negative listed ORP
• Prefer the approximately -722 mV listed ORP specification
• Want a touchscreen interface
• Want universal power input for international use
• Prefer a more premium residential experience
• Want the higher-end residential configuration from the beginning

The K8 is particularly relevant for buyers who place greater importance on electrode configuration and negative ORP when selecting a Kangen Water machine.

Price is another important consideration when choosing between the SD501DX and K8.

The K8 occupies the premium position in the residential lineup, while the SD501DX is positioned as the more balanced home model.

Because retail pricing can change, buyers should review the current price at the time of purchase rather than relying on an older comparison.

If the price difference is significant for your budget and the additional K8 features are not important to you, the SD501DX may provide the more practical choice.

If the price difference is acceptable and you specifically want the additional electrode plate, touchscreen interface, greater electrolysis surface area, and premium positioning, the K8 may be worth considering.

For readers who want to look at the technical details, here is a complete side-by-side comparison.

*ORP values are listed specifications under specified conditions. Actual ORP can vary depending on water quality, incoming water conditions, and flow rate.

Choose the SD501DX if you want a capable residential Kangen Water machine for regular family use, with 7 electrode plates, approximately -631 mV listed negative ORP, simple physical buttons, voice guidance, universal power input, and a five-year warranty.

Choose the K8 if you want the premium residential model, particularly because you value its 8-electrode configuration, approximately -722 mV listed negative ORP, touchscreen interface, and universal power input.

The simplest way to remember the difference is:

SD501DX = Residential + Regular Family Use + 7 Plates + Approximately -631 mV Listed ORP

K8 = Premium Residential + 8 Plates + Approximately -722 mV Listed ORP + Touchscreen

The K8 is not simply a higher-output version of the SD501DX. Both models have the same listed production rates.

Instead, the K8's premium position comes primarily from its 8-plate configuration, more negative listed ORP, and touchscreen interface.

For buyers who want a straightforward residential machine for normal family use, the SD501DX is likely to provide everything they need.

For buyers who want the premium residential configuration and place particular importance on negative ORP, the additional electrode plate, and a touchscreen interface, the K8 may be the more appealing choice.

The SD501DX and K8 are both residential Kangen Water machines, but they serve different preferences within the residential lineup.

The SD501DX is the standard residential choice, particularly well suited to regular family use. It combines 7 titanium electrode plates, approximately -631 mV listed negative ORP, simple physical controls, voice guidance, universal power input, automatic operation, and a five-year warranty.

The K8 is the premium residential choice. Its 8-electrode configuration, approximately -722 mV listed negative ORP, touchscreen interface, and universal power input give it a distinct position above the SD501DX.

For buyers who primarily want a capable residential machine for everyday family use, the SD501DX is a sensible choice.

For buyers who want the higher-end residential configuration, particularly those who place greater importance on the K8's 8 plates and more negative listed ORP, the K8 is the step-up option.

Neither model is universally better for every buyer. The right choice depends on whether the additional characteristics of the K8 are important enough to justify choosing the premium residential model.

If you are still comparing Kangen Water machines, explore the other comparison guides on this website:

SD501DX vs JRIV — Compare the regular residential SD501DX with the budget-oriented JRIV.

SD501DX vs SD501U — Compare a countertop residential model with the under-counter configuration.

Super501 vs Home Models — Understand how the Super501 compares with residential Kangen Water machines.

Full Comparison — Compare the current Kangen Water machines side by side.