3D Magnetic Field Viewer

My job takes me to various research labs to install powerful magnetic systems and to train techs how to use them. This time I needed a magnetic field viewer to show lines of force. This instructable will show how to construct such a device using steel wool fibers and mineral oil. I built this while I was staying at my hotel.

I went to Walmart and got the following items and brought them back to my Hotel.

1. Fine steel wool.
2. Bottle of Mineral Oil in plastic bottle.
3.Scissors.

Use the scissors to cut the steel wool into small short pieces. About a tablespoon of cut steel wool should be enough. Spread out sheets of newspaper on your work surface and try not to get clippings all over the place.

Place the cut steel wool in the bottle of mineral oil. Clean the top of the bottle with a paper towel so you will get a good seal. Squeeze the sides of the bottle as you put on the cap to burp out the air. Shake to disperse the fibers.

Important note: Clean up any mess, and dispose excess fibers in your trash immediately. Place it in a plastic bag so it doesn't spread all over. The longer your mess sits around, the more likely you will spread it.

Place a magnet against the bottle. The viewer will show the lines of force.