Constant Magnetic Field Permanent Magnet

Dexinmag series constant magnetic field permanent magnets have the characteristics of no power supply, energy saving, long-term use without heat, low cost, small size, and lightweight. Due to the fixed air gap, it has good rigidity and the magnetic field is stable, which can be used as a standard magnetic field.

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Constant Magnetic Field Permanent Magnet

Model	Polar diameter (mm)	Air gap (mm)	Magnetic field （T）
DX5010-04	50	10	0.4
DX5010-06	50	10	0.6
DX5010-11	50	10	1.1
DX5020-04	50	20	0.4
DX5020-07	50	20	0.7
DX10020-06	100	20	0.6
DX10020-08	100	20	0.8
DX10020-10	100	20	1
DX10030-05	100	30	0.5
DX10030-07	100	30	0.7
DX10030-11	100	30	1.1
DX14040-05	140	40	0.5
DX15020-14	150	20	1.4
DX15070-05	150	70	0.5
DX165100-05	165	100	0.5
DX200110-05	200	110	0.5

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Calibration Magnet

Calibration Magnet is a permanent magnet specially designed for Hall sheet calibration. It is small in size and light in weight. It is suitable for the calibration of Hall plates with 0.1%~1% accuracy. The normal magnetic field level is 0.1T~1.1T stage, available from stock; The magnetic field can reach 3.0T.

Model	Pole Face Dia. (mm)	Air gap (mm)	Magnetic field in the center (T)	Dimension of uniform field (mm)	Shape (mm)	Weight (Kg)
DX 4010-01	40	10	0.1	Φ6*6	Φ82 x 102	3
DX 4010-02	40	10	0.2	Φ6*6	Φ84 x 102	3
DX 4010-03	40	10	0.3	Φ6*6	Φ84 x 102	3
DX 4010-04	40	10	0.4	Φ6*6	Φ84 x 102	3
DX 4010-05	40	10	0.5	Φ6*6	Φ84 x 102	3
DX 4010-06	40	10	0.6	Φ6*6	Φ84 x 102	3
DX 4010-07	40	10	0.7	Φ6*6	Φ84 x 102	3
DX 4008-08	40	8	0.8	Φ6*6	Φ84 x 115	4
DX 4006-09	40	6	0.9	Φ6*6	Φ82 x 136	5
DX 4006-10	30	6	1	Φ5*5	Φ82 x 136	5
DX 4006-11	30	6	1.1	Φ5*5	Φ82 x 136	5
Uniformity(H/H): 0.001

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The Uniform Magnetic Field for NMR

Nuclear magnetic resonance (NMR) series permanent magnets have high machining accuracy, good stability, and a very uniform magnetic field. The uniformity of the uniform region is guaranteed to be 1 ~ 5 *10⁻⁴.

Model	Pole Face Dia. (mm)	Air gap (mm)	Center magnetic field（T）	Size of uniform field (mm)	Shape (mm)	Weight (Kg)
NMR 7014-03	70	14	0.3	Φ6*3	100 x 124 x 130	8.2
NMR 7014-066	70	14	0.66	Φ6*3	100 x 124 x 130	10
NMR 10020-03	100	20	0.3	Φ8*5	130 x 136 x 166	15
NMR 10020-05	100	20	0.5	Φ8*5	130 x 136 x 166	18
NMR 10030-05	100	30	0.5	Φ6*5	150 x 130 x 134	21
NMR 14025-03	140	25	0.3	Φ10*7	170 x 145 x 210	25
NMR 14025-058	140	25	0.58	Φ10*7	170 x 145 x 210	30
NMR 14030-037	140	30	0.37	Φ8*8	170 x 158 x 210	30
NMR 5030-045	50	30	0.45	Φ6*3	140 x 200 x 160	8.2
NMR 470120-027	470	120	0.27	Φ50*30	440 x 640 x 600	780
NMR 15030-04	150	30	0.4	Φ10*8	230 x 180 x 170	40
NMR 6525-09	65	25	0.9	Φ8*5	285 x 320 x 320	72
Uniformity: 5*10⁻⁴

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Halbach Array Permanent Magnets

A Halbach array is a special arrangement of permanent magnets that augments the magnetic field on one side of the array while cancelling the field to near zero on the other side. This is achieved by having a spatially rotating pattern of magnetisation.
Physicist Klaus Halbach, while at the Lawrence Berkeley National Laboratory during the 1980s, independently invented the Halbach array to focus particle accelerator beams.

The Halbach magnetic cylinder combines the radial and parallel arrangement of the magnet. Suppose the end effect is neglected and the permeability of the surrounding magnetized material is considered infinite. In that case, the permanent magnet structure eventually forms one side field, which is a significant feature of Halbach.

A Halbach cylinder is a magnetized cylinder composed of ferromagnetic material producing (in the idealized case) an intense magnetic field confined entirely within the cylinder, with zero field outside. The cylinders can also be magnetized such that the magnetic field is entirely outside the cylinder, with zero field inside. Several magnetization distributions are shown in the figures

Rotating Magnetic Field Permanent Magnet

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Rotating Magnetic Field Permanent Magnet

The permanent magnet can be made into a rotating magnetic field in the form of mechanical rotation. When the permanent magnet rotates around the center of action of the magnetic field, the sine wave magnetic field can be obtained in the fixed direction of the magnetic field space. The alternating frequency of magnetic field polarity is 0-7hz adjustable, the magnetic field space is large, and the magnetic field strength can be customized.

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Axial permanent magnets

Axial permanent magnets are composed of a combination of special shapes of neodymium-iron-boron magnetic block arrays. Its magnetic field central axis has through holes, high magnetic field strength, and small volume, suitable for optical experiments, and axial probe calibration.

Model	Air gap （mm）	Center magnetic field （T）	Center bore （mm）	Dimensions （mm）	Weight （Kg）
DX2508-04	8	0.3	Φ8	70x100x100	7
DX2508-07	8	0.7	Φ8	70x100x100	7
DX2508-10	8	1	Φ8	70x100x100	7
DX2508-13	8	1.3	Φ8	70x100x100	7
DX2508-16	8	1.6	Φ8	130x136x140	12
DX2508-20	8	2	Φ8	130x136x166	14
Pole Face（mm）: 25*25

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Adjustable Magnetic Field Permanent Magnet

Permanent magnets produce a constant magnetic field has very favorable conditions, but the structure of the single to its application is subject to certain restrictions. Our company is committed to the development of a variety of adjustable magnetic field permanent magnets so that the air gap is adjustable, the magnetic field strength adjustable, and uniform area stability, so that the function of the permanent magnet is closer to the electromagnet, making it more widely used.

Model	Main technical parameters
DXT100-08 Adjustable air gap permanent magnet	The magnetic field air gap is adjustable, and the magnetic field is weakened when the distance between the two poles is increased. The magnetic field is changed in such a manner as to change the air gap, the structure is simple and the operation is simple. The pole diameter is 100mm, the pole surface diameter is 100mm, the air gap is adjustable from 10 to 100mm, and the magnetic field is adjustable from 0.2 to 0.8T.
DXT40-0059 Low magnetic field adjustable permanent magnet	The magnetic field air gap is fixed, the relative position of the poles is unchanged, and the magnetic field is changed in such a manner as to change the width of the magnetic circuit channel. Dimensions: 14065180mm, pole surface diameter Φ40mm, air gap 15mm, weight: 5Kg The central magnetic field is continuously adjustable from 16 to 590 Gs, and the adjustment accuracy is 1 Gs. Center 101010mm spatial uniformity 590Gs=1.6% 16Gs=6%
DXT150-12 Adjustable air gap permanent magnet	The magnetic field air gap is adjustable, and the magnetic field is weakened when the distance between the two poles is increased. The magnetic field is changed in such a manner as to change the air gap, the structure is simple and the operation is simple. The pole diameter is 150mm, the pole surface diameter is 100mm, the air gap is adjustable from 10 to 100mm, and the magnetic field is adjustable from 0.28 to 1.2T.
DXS-1.2 Double magnetic axis adjustable permanent magnet	The DXS-1.2 type permanent magnet adjusts the magnetic field by changing the magnetic circuit without changing the relative position of the magnetic pole, thereby realizing the function of the electromagnet without the need of the excitation power source. It is light in weight, easy to operate, and can be manually operated to adjust the magnetic field; the input shaft can be reserved, or it can be connected with a reducer or a stepping motor to electrically adjust the magnetic field strength, and the adjustment precision can reach 1Gs. Dimensions: 200150200MM, weight: 13Kg Double magnetic axis permanent magnet, magnetic field direction horizontal, pole surface diameter Φ8mm, air gap adjustable range 5mm-25mm. When the air gap is 5mm, the maximum magnetic field is 1.2T, and the magnetic field can be adjusted from 0 to 1.1 T.
DXS50-1 Double magnetic axis adjustable permanent magnet	DXS50-1 permanent magnet, magnetic surface diameter 50mm, air gap adjustable range 5-100mm, adjustable magnetic field, no change of working air gap when adjusting magnetic field, minimum adjustment fineness of magnetic field is less than 1Gs, continuous adjustment of the magnetic field, zero-crossing ; When the working air gap is 5mm, the magnetic field range is 0~ plus or minus 1.0T; when the air gap is 10mm, the magnetic field range is 0~ plus or minus 0.5T; when the air gap is 25mm, the magnetic field range is 0~±0.2T.

Home > Magnetic Field Source > Constant Magnetic Field Permanent Magnet > Product Introduction

The permanent magnet series has a wide range of applications, and permanent magnets can be selected according to different requirements of instruments and equipment. For high-precision magnetic field source requirements such as nuclear magnetic resonance instruments, a permanent magnet magnetic field source is the best choice.
We can according to the user's specific requirements of the magnetic field design of a special-shaped permanent magnet.

Dexinmag is a world-renowned manufacturer specializing in the production of Constant Magnetic Field Permanent Magnets.

DX series Constant Magnetic Field Permanent Magnets for sale: