Ruhmkorff’s Coil Spark Coil
SKU: 41636143365

Ruhmkorff’s Coil Spark Coil

Sale price$326.78 Regular price$363.09
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Description

Ruhmkorff’s Coil Spark CoilRuhmkorff's Coil, also known as a Spark Coil, is a commonly used demonstration apparatus in the classroom for showcasing principles of electromagnetism and high voltage phenomena. Consisting of 2 coils, a primary coil with fewer turns and a secondary coil with more turns, the coil is wound around an iron core. When the primary coil is rapidly interrupted with an electric current, it triggers a high voltage surge in the secondary coil, creating a

Ruhmkorff's Coil, also known as a Spark Coil, is a commonly used demonstration apparatus in the classroom for showcasing principles of electromagnetism and high voltage phenomena. Consisting of 2 coils, a primary coil with fewer turns and a secondary coil with more turns, the coil is wound around an iron core. When the primary coil is rapidly interrupted with an electric current, it triggers a high-voltage surge in the secondary coil, creating a visible spark across a small air gap or discharge tube.

Vibrating points made of tungsten ensure minimal arcing, while a top-quality capacitor and fuse protect the primary winding. The secondary winding, with thousands of turns, can be easily adjusted for optimal coupling.

Read Instruction Sheet

Product Code: SE.EM3450-001
Brand: IEC
Dimensions: 45mm (L) x 56mm (W) x 110mm (H)
Power Supply: 
about 6 to 9V DC
Input: 6 to 9V DC at about 5 amps
Output: 25 to 30mm spark discharge between needle points
Weight:
0.40 kg

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SKU: 41636143365

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joslyn
Battle Creek, US
★★★★★ 5
Great Wall Shelves – Sturdy, Easy to Install, and a Fantastic Value!
Size: 4 pcs: 15.7*5.7, Color: White
I’m really happy with these wall shelves! They’re sturdy, well-built, and hold up perfectly under weight—no concerns about them sagging or bending. The installation was super simple, and everything was clearly labeled with no missing parts, which made the whole process smooth and stress-free. I love that they come in a set of four, making them perfect for displaying books, plants, or decorative items in multiple spots around the room. The design is sleek and minimal, so they fit in with pretty much any style of decor. Overall, these shelves are a great value, and I would definitely purchase them again. Highly recommend if you’re looking for reliable and easy-to-install shelving!
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Reviewed in the United States on November 7, 2024
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Debra Hileman
Pawtucket, US
★★★★★ 4
Looks good but don’t ever take down.
Size: 4 pcs: 15.7*5.7, Color: White
Be ready for gargantuan holes to be put in your wall.
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Reviewed in the United States on March 29, 2026
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Tom Taylor
Louisville, US
★★★★★ 5
Great purchase
Size: 4 pcs: 15.7*5.7, Color: White
Easy to install. Great quality. Would buy it again.
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Reviewed in the United States on March 20, 2026
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Drago
Louisville, US
★★★★★ 5
Beautiful and very easy to install
Size: 4 pcs: 15.7*5.7, Color: White
They look great and very easy to install, I really recommend this product.
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Reviewed in the United States on May 28, 2026
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Jodi Cook
Waukegan, US
★★★★★ 3
Just Ok.
Size: 4 pcs: 15.7*5.7, Color: Maple Wood, Size: 4 pcs: 15.7*5.7, Color: Maple Wood
They look nice but they aren’t sturdy and do not hold much weight. I’ve bought better ones on Amazon.
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Reviewed in the United States on January 12, 2026

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