Can you write on this causing a magnetic image to appear if you attached a small neodymium magnet to the end of dried up pen?

Only if you have a small enough magnet, otherwise the characters would be so large you could only write one word.After reading "Sadly, no." I tried with a small motor magnet and was able to produce "123" and "Hi" that were legible from the front.Not sure if that is useful for you.

Will this show the tracks on magnetic audio tape?

Not usefully. It might just show some magnetic field on a cleverly recorded tape (eg: Like a lightning flash recorder), but neither the resolution nor the contrast would show normal audio tracks. That is simply not it's function.

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Master Magnetics Magnet Source Field Viewer Card (Pack of 1)

Master Magnetics Magnet Source Field Viewer Card (Pack of 1)

Product ID: 292708072

Details

Brand
Master
Colour
transparent
Material
Plastic
Shape
Rectangular
Size
Onе Paсk

📏Compact 2.5" x 4" laminated card

📚Includes clear step-by-step instructions

🧲2 x 1.25" magnetic viewing film

€ 9.59

Duties & taxes included

In stock

Sold byAmazon IrelandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🧲 Unlock the invisible world of magnets—see what others can’t!

PORTABLE STEM POWER TOOL - Slim, laminated card fits in your pocket or toolkit for on-the-go diagnostics.
DURABLE USER FRIENDLY DESIGN - Laminated plastic card ensures longevity and easy handling in any environment.
TRUSTED BY EXPERTS HOBBYISTS - Highly rated tool for magnetic inspection and educational projects alike.
EFFORTLESS LEARNING TEACHING AID - Perfect for educators and professionals to demonstrate real-world magnetism.
VISUALIZE MAGNETIC FIELDS INSTANTLY - Reveal magnet poles and patterns with precision viewing film.

The Master Magnetics Magnet Source Field Viewer Card is a compact, laminated tool featuring a 2 x 1.25-inch magnetic viewing film that reveals the location and number of poles on permanent magnets. Designed for educators, engineers, and enthusiasts, this durable card includes clear instructions and fits easily in your pocket, making magnetic field visualization accessible anytime, anywhere.

Specifications

ASIN	B005HYCM8M
Brand	Master Magnetics
Brand Name	Master Magnetics
Color	transparent with black lines
Colour	transparent with black lines
Customer Reviews	4.2 out of 5 stars 196 Reviews
Global Trade Identification Number	00095421005635, 10095421005632
Item Dimensions L x W x H	5.1L x 3.2W x 6.4H centimeters
Manufacturer	Magnet Source
Manufacturer Part Number	DMVC-1BX
Material	Plastic
Material Type	Plastic
Model Number	DMVC-1BX
Number of Packs	1
Number of Pieces	1
Shape	Rectangular
Size	Onе Paсk
UPC	095421005635
Unit Count	1.0 Count

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