Flux Density Calculator for Plain Disc Magnets

Directions: Fill in the shaded boxes with the Br for the magnet material, the dimensions of the magnet, and the distance from the magnet to the sensor element. The dimensions can be in any units. The resulting field strength at the sensor element, at a temperature of 25C, is calculated.

3250

4.003.00

25.40

Field Strength at Sensor Element (Oe *) 2.823

Br for Disc Magnet Materials

Magnet Material BrCeramic 1 2200Ceramic 5 3300Ceramic 8 3250NdFeB 35 12300NdFeB 39H 13000NdFeB 42 13200NdFeB 45 13300NdFeB 48 13800Samarium 18 8600Samarium 24 9600Samarium 26 10600Samarium 32 11000

Br (Select from Table Below)

L (Length of Magnet)

R (Radius of Magnet)

X (Distance from face of magnet to sensor element)

* In air (µo = 1), Gauss = Oe

R

L X

Sensor