Magnetic Field Viewing Film, Magnetic Field Viewer, 4 x 4 Inch

Good material reveals magnetic fields, sensitive, and a good frame. It will help me with coil winding project. Good value.

Very cool product. The magnetic fields are different than I imagined

Have had a lot of fun with this product. It is geared towards stronger magnets, as it doesn't reveal data on magnetic stripes. Good for subjective comparison of magnetic strengths. Pictured: an N52 round beside a weaker (maybe N35?) rectangle.

I have been using the green field viewer sheets for years, and they are great, but I was looking for something that made a clearer image. So I got some of these. And they are amazing! I thought they'd be good, given the reviews, but I assumed that the photos were faked. They aren't—you really do get different colors and a very striking pattern when you have an interesting magnetic field to make visible.The only downside is this: This film only works on really strong fields. Refrigerator magnets.... Nope. You need strong rare earth magnets to see a good effect. But if you have strong magnets and you need to make a striking visualization of their field.... This is a great tool for the job!

Purchase this to replace a much smaller lower resolution similar device. This thing was cheap. Didn't expect much and when it came the holder that holds it had come unglued just had to glue it back together and it looked as it should. But also didn't realize that I should have just took it out of the holder because I'm pretty sure the holder is just for purposes of transportation. That being said, this thing works great. The resolution is exceptional and it really helps you see those magnets on a hall sensor very easily. Use it in my automotive technician class. Wish I had it when I was a tech,

I used it to visualize the magnetic fields of guitar pickups. Some of them have cover and are sealed so this helps me to see the real construction behind (blades, screws etc.) Also it gives very general idea of the field strength which is nice and of course is represented visually.

Works just like the description. 🤩

This magnetic field viewing film performed exactly as I needed—clearly showing the magnetic field pattern of a camshaft sensor’s target magnet so I could confirm it was functioning properly without wasting money on unnecessary parts. The detail it reveals made diagnosis quick and confident. Beyond that single repair, it’s become a fascinating tool for exploring magnets in everyday items and seeing how their fields are arranged. The film is reusable, easy to handle, and has already provided more value than I expected—both for practical troubleshooting and satisfying my curiosity.

It’s ok.