Helmholtz Coil

Helmholtz coils are ideal for quality checking of magnetized magnet parts or getting a fairly uniform magnetic.

Brief Introduction:

Helmholtz Coil is consisted of two coils which are the same.It is useful laboratory technique for getting a fairly uniform magnetic field. The distance between the two coils is equal to the radius of coil. Helmholtz coil is used to generates small and uniform magnetic field, and it is also used for measuring the magnetic flux of magnet. When measuring the sample.

MM series 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). 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 instrinsic open circuit operating B (Bd i) 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

A precision Helmholtz coil set with 10 inch diameter coils, suitable for use with all types of permanent magnets. Construction is aluminum and brass with fully shielded coils. A hand-operated sample rotation mechanism with precise 180o rotation is built in. Sample loading is quick and easy, using a simple hand-operated clamp. The sample holder can be changed to accommodate various sizes and shapes of magnets. This coil set can be used to test the magnetization of sintered ferrite, Nd-Fe-B ("Neo"), sintered rare earth magnets, bonded magnets and other magnet types with largest dimension approximately 3.5 inches. Includes certification of coil constant. Recommended for use with the Magnetic Instrumentation, Inc. Model 2130 Fluxmeter Measurement System.

Technical Data:

MM series Helmholtz Coils

Uesd with fulxmeter for magnet moment measurement.

	MM-75	MM-150	MM-200	MM-300
Inside diameter	70 mm	140 mm	200 mm	300 mm
Coil resister (approx)	4.3KΩ	110Ω	110Ω	140Ω
Coil constant (approx)	0.002 Cm	0.016 Cm	0.028 Cm	0.047 Cm

Other size  can also be customized. 

Helmholtz Coil