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Magnetic Field Viewer Card 25/30/50mm – Pattern Display Film
Magnetic Field Viewer Card 25/30/50mm – Pattern Display Film
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See the Invisible — Visualize Magnetic Fields Instantly
The Magnetic Field Viewer Card is a compact, flexible encapsulation film that makes static magnetic fields visible to the naked eye. Simply place the card over any magnet or magnetized surface and watch the hidden field pattern appear in vivid detail. Available in three sizes — 25×25mm, 30×30mm, and 50×50mm — this handy tool is perfect for students, engineers, hobbyists, and quality-control professionals alike. Made in China.
Why You'll Love It
- Instant Magnetic Visualization: Reveals the shape and pattern of static magnetic fields in real time — no power source required.
- Flexible Film Design: Highly pliable ABS-encapsulated film conforms to both convex and concave magnetic surfaces for accurate field mapping.
- Multi-Use Applications: Ideal for quality control, product demonstration, reverse engineering, certification testing, and science education.
- Compact & Portable: Slim, lightweight card fits easily in a pocket, toolbox, or lab kit — take it anywhere.
- Stimulates Scientific Curiosity: A fantastic educational aid for classrooms, science fairs, and personal research projects.
- True Color & Gray Effects: Displays field patterns in both true-color and grayscale modes depending on the viewing angle and light.
Specifications
| Part Name | Magnetic Field Viewer / Observer Card |
| Available Sizes | 25×25mm | 30×30mm | 50×50mm |
| Color | Yellow (card body) |
| Display Effect | True Color & Gray |
| Material | ABS Plastic |
| Quantity | 1 piece per order |
| Country of Origin | Made in China |
Package Contents
- 1 × Magnetic Field Viewer Card (size of your choice)
Please Note
Allow 1–2 cm tolerance due to manual measurement. Actual color may vary slightly from product images due to monitor differences.
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For more information on magnetic fields and their scientific applications, visit the U.S. Department of Energy – Basic Energy Sciences resource.
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Frequently Asked Questions
Q: What sizes does the Magnetic Field Viewer Card come in?
A: The magnetic field viewer is available in three sizes: 25×25mm, 30×30mm, and 50×50mm. Choose the size best suited to your magnet or application — the 50×50mm card is great for larger surfaces, while the 25×25mm card is ideal for small or precision magnets.
Q: How does the Magnetic Field Viewer Card work?
A: The card contains a specially formulated encapsulation film with micro-particles that align with magnetic field lines when placed on or near a magnetized material. This alignment creates a visible pattern that maps out the shape and polarity of the magnetic field — no batteries or electricity needed.
Q: Can it be used on curved or uneven magnet surfaces?
A: Yes! The film is highly flexible and conforms to both convex and concave magnetic surfaces, making it suitable for round magnets, irregular shapes, and flat surfaces alike.
Q: What are common uses for this magnetic field viewer?
A: This tool is widely used in science education, classroom demonstrations, quality control inspections, reverse engineering, product certification, and personal scientific research. It's also a popular tool for hobbyists working with electronics, motors, or custom magnet arrangements.
