Standard Helmholtz Coils

Helmholtz Coils are ideal for the measurement of Rare Earth (Samarium Cobalt, Neodymium) and Hard Ferrite permanent magnet materials (materials which exhibit a relative straight line demagnetization). Our standard Helmholtz Coils are for use with fluxmeters. The Helmholtz Coil measures the magnet sample as a single magnetic moment provided that the longest dimension of the magnet sample is less than one-third (1/3) the diameter of the coil system. By definition, the magnetic moment per unit volume is the intrinsic magnetization of the sample. With our calibrated Helmholtz Coil and Integrated Fluxmeter – and given the volume of the permanent magnet sample – the intrinsic open circuit operating B (Bdi) can be measured.

The Helmholtz Coil and Fluxmeter are used for the measurement of a wide range of magnet sizes, materials, and geometries without specimen destruction, complicated set-up times, or bulky and expensive equipment. Complex geometries common with Neodymium, Samarium and Hard Ferrite permanent magnets, including motor arc segments, can be easily measured. Consult one of our experienced engineers for design and application assistance.