0769-23388351
Toggle Navigation
Multipole magnet refers to a magnet with more than one magnetic pole on one surface of the magnet. Most of these magnets are mainly circular and are widely used in various magnetic sensors, permanent magnet DC motors, and their installation distance is highly concerned. Some netizens have asked if the distance between a multipolar magnet and a Hall sensor must be within two millimeters? Permanent magnet manufacturer NST Xiaofu will introduce this issue.
The optimal working distance between a Hall sensor and a multipole magnet is not fixed. It can be 2mm or other distances depending on the sensitivity of the Hall sensor, the magnetic field strength, material, and number of magnetic poles of the magnet.
In terms of magnet types, magnets made of high-performance magnetic materials such as neodymium iron boron (NdFeB) can provide stronger magnetic fields at longer distances, thereby improving the effective detection range of Hall sensors.
Bonded neodymium multi-pole magnetic ring
In terms of magnetic field strength, a stronger magnetic field can allow for greater distances.
Sensitivity of Hall sensors: Different models of Hall sensors have different sensitivities, and high sensitivity sensors can be slightly farther away.
Furthermore, the number of magnetic poles in a magnet also affects the distance between a multipole magnet and a Hall sensor. Compared to simple bipolar (2-pole) magnets, multipole magnets (such as 4-pole, 8-pole, etc.) have more stringent requirements for the distance between the Hall sensor. Typically, the sensor needs to be tightly attached within a range of 2 millimeters to achieve optimal performance and accuracy.
So, sometimes in order to ensure that the Hall sensor can stably detect magnetic pole changes, especially in precision control or space limited situations, it may be required that the distance between the sensor and the magnet be as small as possible (such as less than 2 millimeters). 2mm is a reasonable value, but it is not necessary. In practical applications, the appropriate distance can be selected within the range of 1-5 millimeters according to the specific situation.
Our company is a professional supplier of multipole magnets, which can provide you with multipole magnets of various materials and magnetic poles. If you need sample testing and price evaluation, please feel free to contact us.
Related multipole magnet products;
This product is a magnetic encoder disk designed specifically for encoders. It features a ring-shaped design made of rubber-ferrite material with a dual-ring magnetization structure, available in 64-pole and 62-pole configurations. The specifications are: outer diameter 29 mm, inner diameter 15 mm, and thickness 1.1 mm....
Neodymium round magnets with a diameter of 5mm and a thickness of 4mm are more commonly used. If you feel that the magnetic force is not enough, the performance level can be appropriately improved. Welcome to consult the price!...
Our company is a permanent magnet supplier from China. We are good at processing micro-precision magnets, high-performance magnets, special-shaped magnets, and multi-pole ring magnets. The quality is guaranteed and the price is not expensive. We look forward to customer consultation from all over the world....
The sample is an N52 high-performance ultra small hole radially sintered neodymium rotor magnet, with specifications of 2mm outer diameter, 0.9mm bore, and 4.5mm height....
This is a square neodymium magnet for earphones, the length and width are 5mm, the thickness is 2mm, the thickness is magnetized, the surface is galvanized, 1mm or other thickness can also be selected, non-high temperature grade, the maximum working temperature is less than 80 ℃...
The sample is a high-performance ferrite rotor magnet with a radial 3-pair pole configuration (6 poles), measuring 20mm in outer diameter, center bore diameter of 8mm, and height of 27mm. surface magnetic flux density reaches approximately 1800 Gauss....
This is a small-sized short bar shaped neodymium iron boron strong magnet with a specification of 1.5 × 1.5 × 10mm. It is made of N42 performance grade neodymium iron boron material and magnetized along the length direction (10 mm direction)....
This is a rare earth NdFeB strong magnet with a length of 30mm, a width of 20mm and a thickness of 10mm. Surface treatment is nickel-copper-nickel, and the thickness is 10mm. Magnetization direction is length direction....