The SG7 Pro is a high speed / high volume generator which can produce high quality colloidal silver hydrosol at the rate of about 1 gallon per hour at a concentration of 10 PPM. Or it can make 2 gallons per hour at 5 PPM. Or 15 PPM per gallon in 1 1/2 hours. It shares some functions with the SG6. It has variable PPM control, constant current control and automatic shutoff. It also has another function which allows the electrodes to be self cleaning. You do not need to wipe the electrodes after making a batch of CS. When the cycle is complete, you merely open the spigot on the container and allow the liquid to drop into your storage containers. It will be necessary to allow settling of the CS before draining as there is a circulating pump in the container that will keep all particles in motion until the pump is turned off. The particles of elemental silver which are continually being removed from the self cleaning electrodes during production will normally fall to the bottom of the vessel after the pump is turned off. Once those particles have settled, you may start the draining process. Or, you may filter the colloidal silver hydrosol if desired. The current flow is 30 times that of our standard models, so you can see it produces CS 30 times faster in a given amount of water. We state the output of these generators will be from 5 to 15 PPM but we actually calibrate these units to over 20 PPM at the "High" setting. That way, you can be assured of getting at least 15 PPM or more if you so desire. We do NOT recommend filtering. It can cause agglomeration if you use an improper filter. The container holds 5 gallons. It is FDA approved for food service. The electrode assembly sits on top of the container and the electrodes are immersed in the water about 5 inches. The electrode assembly is composed of 4 silver plates each 1.5" in width. This electrode assembly has approximately 15 times the surface area of our SG6 Auto model. The electrode assembly is attached to the cross strut with through bolts and nylon wing nuts. It is replaceable and includes the 6 foot long cord which plugs into the generator. The electrode assembly may be placed on any convenient sized vessel other than the vessel supplied by SilverGen The only difference will be the processing time. Larger volumes of water will require a proportionately longer run time. The container is supplied with a tight fitting lid. You can lift the electrode assembly off and store all components inside and seal it from external contamination when not in use. This allows easy storage of your system components. European model is $674.00 SG7$699.00Voltage: 120-volt240-volt-$50-more More Information on Colloidal Silver Hydrosol