The grade of a magnet is important. It tells you how strong the magnetic material used for the magnet is. The higher the grade, the more expensive and powerful the magnet.
However, measuring the grade is not easy. I have successfully tested it on 70x20 mm disc magnets, but what about my largest magnets: the monstrous Ø200x50 and Ø150x100 mm disc magnets? Let's find out!

Spreadsheet for calculations: https://www.supermagnete.com/faq/flux
Original paper with calculations: https://www.researchgate.net/p....ublication/262707508

The F71 Teslameter donated earlier by Lake Shore Cryotronics:
https://www.lakeshore.com/prod....ucts/Gaussmeters/F71

200x50 mm and one of the 150x50 mm disc magnets donated earlier by https://www.magnetportal.de/

My Patreon-page: https://www.patreon.com/Brainiac75

More details on the center axis method for grade estimation: https://www.youtube.com/watch?v=q9YkbTwFRkk
Unboxing the 200x50 mm: https://youtu.be/yM4Xe2c0B8M
Using a kitchen scale for ranking magnet strengths: https://youtu.be/mXAAd_wsXgE
Did you miss one of my magnet videos?: https://www.youtube.com/user/brainiac75/videos

FULL MUSIC CREDITS
Time codes: 0:01 + 4:48 + 9:45
"Hiding Your Reality" Kevin MacLeod (incompetech.com)
ISRC: USUAN1700081

Time code: 0:38
"Long Note Three" Kevin MacLeod (incompetech.com)
ISRC: USUAN1100424

Time code: 1:19
"Lightless Dawn" Kevin MacLeod (incompetech.com)
ISRC: USUAN1100655

Time codes: 3:13 + 4:05 + 6:56
"Perspectives" Kevin MacLeod (incompetech.com)
ISRC: USUAN1300027

All music above licensed under Creative Commons: By Attribution 3.0 License
http://creativecommons.org/licenses/by/3.0/

Time code: 6:28
Mix of two tracks:
1) The Shimmering by fran_ky (freesound.org/s/237363)
Licensed under Creative Commons 0 license
2) "Spacial Harvest" Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0 License
http://creativecommons.org/licenses/by/3.0/
ISRC: USUAN1100653

#MagnetGrade #MonsterMagnet #Brainiac75