DX-2012MQ Rare Earth Permanent Magnet Material Quality Testing Device
Using flux gauges and Helmhotz coils to test the quality of rare earth materials has become a popular inspection method among enterprises. Although the testing of material magnetic properties is not as accurate as permanent magnet BH measurement devices, and it does not provide the intrinsic coercive force Hcj parameter of the material, its reliable magnetic moment data and lower equipment cost make it suitable for transmission and communication between all material manufacturers and users. It will play a greater role in future magnetic measurement fields.
Utilizing a fluxmeter in conjunction with a one-dimensional Helmhotz coil, primarily applied for measuring the flux of permanent magnet devices under the coil's conditions. Multiplying by the coil constant yields the device's magnetic moment. For samples with standard dimensions, material properties such as Br, Hcb, and BHmax can be calculated. Experimental validation shows that testing cylindrical, annular, and cuboid rare earth permanent magnet samples with one-dimensional coils can accurately measure the total magnetic moment M (more accurately, Mz). By utilizing the near-linear demagnetization curve of the material's BH curve, the material's three key magnetic properties—Br, Hcb, and BHmax—can be accurately estimated, thereby determining material quality. This is particularly useful for transmitting the quality of rare earth permanent magnet materials between material and user companies. The accuracy and repeatability of the magnetic moment test far exceed those of BH test instruments when transmitting standard sample data, with high testing efficiency enabling full inspection of all magnetized samples, promptly identifying device defects, and ensuring accurate judgments of the material's magnetic energy product grade.
| Product Features |
| ● Utilizes a microcontroller design for automatic calculation, offering intuitive and convenient operation. |
| ● Suitable for all rare earth permanent magnet materials, low equipment cost. |
| ● Easily measure the magnetic flux Ø and magnetic moment M of the material, and calculate data such as Br, Hcb, BHmax, etc. |
| ● Can measure rare earth samples of various sizes, no longer limited by sample size. |
| ● Optional Non-magnetic Heating Ceramic Furnace, obtain the M-T curve of rare earth permanent magnet through temperature test. |
| ● Suitable for testing thermal stability and irreversible flux in rare earth permanent magnet materials. |
| ● The flux gauge utilizes low-drift technology for more stable and accurate testing. |
| Technical Specifications |
| ● Power Supply: AC 220V/0.5A |
| ● Test Ranges: 1 mWb, 10 mWb, 100 mWb, 1000 mWb, four levels |
| ● Corresponding input impedance: 1k ohm, 10k ohm, 100k ohm, 1000k ohm |
| ● Accuracy of Test: 0.5% |
| ● Drift: 1 uWb/min |
| ● Low Resolution: 0.1 uWb (corresponding to a 2 mWb range) |
| ● Dimensions: 285mm x 300mm x 100mm, Weight: 3kg; (Width x Depth x Height) |
| ● Operating Environment: 0°C to +50°C, humidity: 35% to 80%. |
Case Studies
1. SmCo28H Sample Dimensions: L20mm x W10mm x 5mm. Test data using DX-2012H permanent magnet material measuring device: Br=10.83kGs, Hcb=10.26kOe, Hcj≥30kOe, BHmax=27.78MGOe.
The DX-2O12MQ rare-earth permanent magnet material quality tester is configured with a one-dimensional Helmholtz coil (urec calculated at 1.05):
Part Number | M(uWbm) | Ø（mWb） | Br(T) | Hcb(kOe) | BHmax(MGOe) |
| 1 | 1.059 | 2.659 | 1.088 | 10.08 | 27.42 |
| 2 | 1.059 | 2.659 | 1.088 | 10.08 | 27.41 |
| 3 | 1.059 | 2.66 | 1.088 | 10.09 | 27.43 |
| 4 | 1.06 | 2.663 | 1.089 | 10.1 | 27.49 |
| 5 | 1.059 | 2.661 | 1.088 | 10.09 | 27.45 |
| 6 | 1.059 | 2.661 | 1.088 | 10.09 | 27.45 |
| 7 | 1.06 | 2.663 | 1.089 | 10.1 | 27.49 |
| 8 | 1.059 | 2.661 | 1.088 | 10.09 | 27.44 |
| 9 | 1.059 | 2.66 | 1.088 | 10.09 | 27.43 |
| 10 | 1.06 | 2.662 | 1.089 | 10.09 | 27.47 |
| Average | 1.0593 | 2.6609 | 1.0883 | 10.09 | 27.448 |
| Value | 1.06 | 2.663 | 1.089 | 10.1 | 27.49 |
| Minimum Value | 1.059 | 2.659 | 1.088 | 10.08 | 27.41 |
| Positive deviation % | 0.066 | 0.0789 | 0.0643 | 0.0991 | 0.153 |
| Negative deviation % | -0.028 | -0.0714 | -0.0276 | -0.0991 | -0.1384 |
Test repeatability; the difference between Br accuracy and BH testing device is controlled within 0.6%, using a permeability coefficient of 1.05 (can be optimized), with Hcb deviation less than 1.56% and BH deviation 1.04%.
2. N30M Sample Dimensions: D13.08mm × H6.35mm, tested with DX-2012H Permanent Magnet Material Measurement Device, data as follows: Br=11.06kGs, Hcb=10.68kOe, BHmax=29.53MGOe.
Utilizing the DX-2012MQ Rare Earth Permanent Magnet Material Quality Testing Device, equipped with a one-dimensional Helmholtz coil (urec calculated at 1.05):
Item Number | M(uWbm) | Ø（mWb） | Br(T) | Hcb(kOe) | BHmax(MGOe) |
| 1 | 0.9232 | 2.319 | 1.105 | 10.52 | 29.06 |
| 2 | 0.923 | 2.318 | 1.105 | 10.52 | 29.05 |
| 3 | 0.9227 | 2.318 | 1.104 | 10.52 | 29.03 |
| 4 | 0.9226 | 2.317 | 1.104 | 10.52 | 29.02 |
| 5 | 0.9227 | 2.318 | 1.104 | 10.52 | 29.03 |
| 6 | 0.9226 | 2.317 | 1.104 | 10.52 | 29.02 |
| 7 | 0.9223 | 2.317 | 1.104 | 10.51 | 29.01 |
| 8 | 0.9221 | 2.316 | 1.104 | 10.51 | 28.99 |
| 9 | 0.9216 | 2.315 | 1.103 | 10.5 | 28.96 |
| 10 | 0.9216 | 2.315 | 1.103 | 10.5 | 28.96 |
| Average | 0.92244 | 2.317 | 1.104 | 10.514 | 29.013 |
| Value | 0.9232 | 2.319 | 1.105 | 10.52 | 29.06 |
| Minimum value | 0.9216 | 2.315 | 1.103 | 10.5 | 28.96 |
| Positive Deviation % | 0.0824 | 0.08632 | 0.09058 | 0.0572 | 0.162 |
| Negative Deviation % | -0.0914 | -0.0863 | -0.09058 | -0.1332 | -0.1827 |
Test repeatability; BR accuracy compared to BH testing device shows a deviation of 0.2%; magnetic permeability coefficient is calculated at 1.05 (can be optimized); Hcb deviation within 1.55%, BH deviation 1.75%.
About Us
Xiamen Yinde Xingcetong Magnetics Technology Co., Ltd. was established in 2008, nestled in the beautiful city of Xiamen, Fujian Province, China, which is also an international seaport. Yinde Xingcetong Magnetics is a high-tech enterprise with comprehensive services in the international magnetic measurement industry. The company boasts a team of experienced technical staff in the magnetic measurement field and collaborates with universities and research institutions at home and abroad, providing precision measurement equipment systems and excellent after-sales service to customers worldwide.
Our primary equipment and measurement systems developed by the company include: digital teslameter/gaussmeter, fluxmeter, Hall effect sensor, Helmhotz coil, electromagnet, permanent magnet for NMR, precision current source, lock-in amplifier, weak magnetic shielding system, AC/DC magnetic field control system, new energy meter magnetic measurement system, multi-dimensional magnetic field testing system, permanent magnet material measurement system, vibration sample magnetometer, etc.
Manufacturing facility
Berlin Trade Show
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