The purpose of this test data was to identify how far out the magnetic
field extended and what is polarity was at varying distances from the edge of the
magnet.
The magnet in this example is 3 of my 4 x 6 x 0.5 inch N42 plates combined into
a 1.5 inch thick plate monster.
The numbers in green are South Pole and the readings in red are North Pole
Readings at the surface
160 150 150 3.0"
210 195 195 2.5"
260 260 250 2.0"
340 350 320 1.5"
440 440 430 1.0"
540 570 560 0.5"
      3,560       3,400       3,270
Distance from edge     Distance from edge
3.0" 2.5" 2.0" 1.5" 1.0" 0.5"     0.5" 1.0" 1.5" 2.0" 2.5" 3.0"
   
   
220 280  360  490  650  880       3,240       3,460    550    420    320    240    195    150
   
   
   
   
205 290  380  510  670  960       3,310       3,340    820    620    430    330    250    195
   
   
   
   
160 205  270  340  440  550       3,460       2,980       3,530    700    580    450    350    270    200
0.5" 720 739         550
1.0" 510 530         430
1.5"         390         380         320
2.0"         290         290         250
2.5"         220         220         200
3.0"         170         170         160