This 10x25mm rod permanent rare earth magnet packs a lot of power in a small space with enough pull at 10mm to be an effective stud finder.
Want to demonstrate eddy current braking? Drop this magnet down a 1/2" diameter copper or aluminum pipe & be amazed. Compare results with the 10x10mm, 10x12.5mm, 10x15mm, 12.5x12.5mm or 12x25mm rod magnets. Or, go big with a 1" pipe & use the 25x20mm big disc magnet....bring something to read.
The Mark II Magnaprobe is an excellent tool for detecting magnetic fields & is must for any college or high school electricity & magnetism lab. See it in action below in our eddy current-drop tower braking simulation or read our blog Eddy Current Copper Tube Drop Tower Brake Test.
Even more impressive is the ultrasensitive Mark I Magnaprobe which responds to magnetic fields as weak as 0.3 gauss. A must if your cyclotron or particle collider is slightly off. In this instance, it was able to detect the eddy current in the simulation below at a distance of over 1m (3.3 feet)!
| Field Strength (Gauss) & Pull Force in Pounds & Kilograms at 5 Distances Above Magnet | |||||
| SKU: 44203-25 Size: 10 × 25mm | |||||
| Distance (mm): | 0 | 0.1 | 1 | 10 | 100 |
|---|---|---|---|---|---|
| Gauss | 6471.8 | 6340.8 | 5186.9 | 630.4 | 3.0 |
| Lb | 10.19 | 9.78 | 6.55 | 0.10 | 0.00 |
| Kg | 4.63 | 4.45 | 2.98 | 0.04 | 0.00 |
Magnet Documentation |
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| Drawing | Compliance | MSDS | ROHS | Graph | |
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| RemanentFlux Density (Br) | 13,000G; 1300mT |
| Coercivity (bHc) | 12.0 Oe; 955 A/m |
| Intrinsic Coercivity (jHc) | 17.0 Oe; 1353 A/m |
| Max.Energy Product (BHMax) | 42 MGO; 334 kJ/m3 |
| Curie Temperature (Tc) | 310oC |
| Working Temperature (Tw) | 80oC |
| Temp.Coefficient (αB)r | -0.12%/Co |
| Dimensions | Tolerances | |||
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Size: |
Inches | mm | Inches | mm |
|---|---|---|---|---|
| 0 to 0.125 | 0 to 3 | +/- 0.006 | +/- 0.15 | |
| 0.126 to 0.625 | 3 to 16 | +/- 0.012 | +/- 0.30 | |
| 0.626 to 0.875 | 16 to 22 | +/- 0.018 | +/- 0.45 | |
| 0.876 and Up | 22 and Up | +/- 2.5% | +/- 2.5% | |
| Inch | Decimal | mm | Rounded |
|---|---|---|---|
| 1/32" | 0.031 | 0.8 | 1 |
| 3/32" | 0.094 | 2.4 | 2.5 |
| 5/32" | 0.156 | 4.0 | 4 |
| 1/16" | 0.063 | 1.6 | 1.5 |
| 3/16" | 0.188 | 4.8 | 5 |
| 2/10" | 0.200 | 5.1 | 5 |
| 1/8" | 0.125 | 3.2 | 3.75 |
| 1/4" | 0.250 | 6.4 | 7.5 |
| 5/16" | 0.313 | 7.9 | 7.5 |
| 3/8" | 0.375 | 9.5 | 10 |
| 13/32" | 0.406 | 10.3 | 10 |
| 1/2" | 0.500 | 12.7 | 12.5 |
| 9/16" | 0.563 | 14.3 | 15 |
| 5/8" | 0.625 | 15.9 | 15 |
| 11/16" | 0.688 | 17.5 | 17.5 |
| 3/4" | 0.750 | 19.1 | 20 |
| 13/16" | 0.813 | 20.6 | 20 |
| 7/8" | 0.875 | 22.2 | 22.5 |
| 15/16" | 0.938 | 23.8 | 25 |
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Ron Bennett: Fantastic support and product. Beats Amazon price with real customer service...product was of the highest quality and exactly as described.
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