Designer hints and guide for Magnetic Measurement for Magnetic Equipment and the testing of existing Magnetic Equipment

The design of magnetic devices and equipment is complex; a good starting off point is to review some guidelines and definitions of the various terms and measurements found HERE.

Whilst programs exist for specific design like the output of an electric generator such special programs are beyond our supply scope or capabilities. At our offices in Randburg we have a display of all of our stock magnets so that designers can physically handle the magnets. We have gauss meters, magnet viewers, and compasses and also over the years we have established a library of books journals and articles on magnetic equipment and applications. Our experienced staff will be available to advice & assist in all technical matters.

We stock a wide range of magnets in various shapes and materials which we call our standard range. Metal Alloy magnets are produced by foundry process so special sizes mean new moulds and often the makers apply a MOQ. Special sizes of ferrite magnets are generally easier; unmagnetised blocks can be cut by diamond wheel from other blocks in 12mm and 25mm thick and then magnetised but only straight cuts can be processed. Rare Earth Neo magnets offer the best options for special shapes and sizes. Special patterns of magnetisation will be limited depending on the type of magnetic material used.

To strive to overcome the contraints of special sizes the designer can seek to use standard stock size magnets and dd shapes mild steel pole pieces. If a higher flux is required at a surface then one can place on the other side of the magnet a steel plate, steel plates can also be used between like poles to intensify the field at the edge of the steel plate. Magnets can also be stacked one on top of the other to increase surface flux.. Lastly designers must remember to maintain air gaps to a minimum as magnetic adhesion diminishes by the square of the air gap distance.  

Testing of existing magnetic equipment

In many industries particularly in the food and process industries where magnetic equipment like grid magnets, plate magnets, magnetic head pulleys and alike are used, there are requirements that such magnetic equipment is tested at regular intervals. Such tests are normally to measure the surface magnetic flux using a gauss meter but will also make use of magnetic viewers and plotting compasses.


Product Name: Gauss meter
Gauss meter
Gauss meter

GMET H001 Gauss meter
Axial + Transverse probes measures

Range1: 1-3000 gauss (0.0001-0.3 Tesla)
Range2: 10-30 000 gauss (0.001-3 Tesla)

NOT SUTIABLE FOR AC magnetic fields


Product Name: Magnetic Viewer

Available in 2 sizes

Student - small 50mm x 60mm
Cat no: MAS 041

Lecturer - large 100mm x 60mm
Cat No: MAS 042

Product Name: Plotting Compass plotting compass