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Van de Graaff Generator


In Stock

$209.95 in_stock
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Quick Overview:
Generate up to 200,000 volts of low-amperage electricity to safely experiment with electric fields and electric forces.
Ages 13+

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More Information

  • Detailed Van de Graaff Generator operating manual explains theory of operation, care, use, maintenance, and experiments

Van de Graaff Generator


Generate up to 200,000 volts of low-amperage electricity to safely experiment with electric fields and electric forces! This deluxe table-top Van de Graaff generator will consistently produce 5-6" sparks (12" sparks are possible!) and can raise your hair almost instantly! It comes fully assembled and includes a grounded discharge wand to begin experimenting immediately.

The detailed operating manual explains electric fields, how the Van de Graaff generator works, how to use and maintain it for maximum performance, and several experiments, including the classic hair-raising experiment and producing spectacular St. Elmo's fire.

Because the current produced by this Van de Graaff generator is so low, it's safe to play with the hundreds of thousands of volts of electricity it generates! This makes a fun and very memorable scientific demonstration of the difference between voltage and current.

Robert J. Van de Graaff, a professor at MIT, invented this generator in the 1930s. A belt inside it generates static electricity, which spreads to the metal dome on top.

Detailed Specifications
  • Discharge voltage: up to 200,000 volts
  • Spark length: 5-6" typical, up to 8-12" with low humidity
  • Dome diameter: 20 cm (extra large) nickel-plated steel
  • Discharge ball: 6 cm diameter
  • Input voltage: 110 volts
  • Input power: 70 watts
  • Belt: rubber
  • Upper roller: nylon
  • Lower roller: ABS plastic
  • Column: clear acrylic
  • Rugged metal base, stands 20" tall
  • Home Science Tools kit with one-year limited warranty.
Customer Reviews

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A really nice product Review by
I'm so happy about my purchase. I have receive it this week and try it right away. It seem to me that it is a well build machine and it does what it should do very well. I'm even planning a special event during Halloween that I will call "scary to make your hair stand... Literaly..." Or something like that. A lot of fun in perspective.
Now that's science! Review by
This just takes science to a whole new level. Whenever people ask about homeschooling not being up to "par" with public school, the kids bring this out and they are blown away. The kids definitely take science more seriously. It does raise your hair, although, of course, not as dramatically as something from Science World, but if your hair is really dry, it does a good job of it. Just make sure your are touching the sphere first before you turn it on, as to try touch it after it is already going can give some pretty good shocks. ( Although my DH and all his friends do this purposefully to show their manliness :0 ) Because it is a little out of most peoples budgets, we got one to add to our homeschool lending library.
TV Weather/Presenter Review by
Product is not bad for the price, but it does have some drawbacks. Sparks are only about 5" long, but depending on how mych you fiddle withthe belt tension....it will raise the hair on one's head! The motor is not powerful enough to get the belt rolling, unless you first drastically loosen the tension screws on the belt. Once the belt starts moving rapidly, you then have to tighten the tension screws considerably before an electrostatic charge will develop. Also...the three tiny screwss that hold the belt column into the base are very flimsy and makes the unit fragile and wobbly during transport. [HST adds: We expect you to achieve 5-6" sparks! Over the years we have had to replace the motors on about 2% of these Van de Graaff generators. If you have one that is not working properly, please contact us at 800-860-6272 so we can correct it. We recommend you transport these units in the form-fitted styrofoam case it is shipped in, which provides adequate protection.]

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