The National Executive Committee has established a fair, accurate, and repeatable process and procedure to measure magnets.

Due to the adoption of new testing equipment and procedures, the approved magnet limits have changed. To accurately measure according to the NIST national standard for gauging magnets—and due to the inability to obtain a Spin Doctor meter—the decision was made to transition to a new calibratable meter that accurately and consistently measures gauss ratings.

Magnet Testing Procedure




Official Meter Details
Meter - Calibrated IDR-329-T-UL: High Precision DC Kilogauss meter with Hall Effect transverse probe. 

Purchase details - Obtainable from Integrity Design & Research Co. http://www.integritydesign.com/DCmeasurement.html

Jig to hold magnets - available soon


*Note - Only currently approved magnets prior to 2026 were used to establish the new limits with the new procedures.

Approved Magnets by class