The Tesla meter reads magnetic field strength. Here the highest reading on the edge of a large NIB magnet is 0.746 Tesla.
“Continue reading” for readings of a wide variety of magnetic sources.
The Tesla meter is also known as a Gaussmeter. 1 Tesla = 10,000 Gauss. Hence the field of the magnet above is 7,460 Gauss. Interestingly the field at the centre of the face of the magnet reads 5740 Gauss. Hence the outer edge reads 30% higher then the centre.
So let’s measure some things.
A compass is, of course, a small magnet which is on a very low friction mount and will align with the Earth’s magnetic field. Here it reads 0.5 milliTesla. The Earths magnetic field is around .05 mT. This is an order of magnitude below the lower reading of the meter.
Here is a small bar magnet showing a positive reading of 60.1 mT with respect to the North pole and -63.7 mT with respect to the South pole. Note the magnet is flipped. They are not quite equal but probably within experimental error. But lets look at the field with viewing film.
There is considerable distortion of the field around the South pole end which might contribute to some asymmetry. Presumably from being thrown in the same box with a lot of big magnets.
I would like to measure the field from our local MRI machine.
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Achieving 1.6 Tesla with NIB magnets
Photo Date: June 5, 2013