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 is a very small rectangular ferrite block magnet, measuring 2.45 mm in length and 1 mm in both width and height. It is magnetised along its length and is barely noticeable when held in the hand....
7.4x6x5mm Ferrite Small Block Magnet Introduction，Material: Hard Ferrite (Ceramic)，Shape: Block / Rectangle / Bar，Coating: No Coating，Grade (Chinese Stardard): Y30，Operating temperature: -40°C to 250°C，Delivery time: 7-15 days，Magnetization direction: thickness....
U-shaped neodymium magnets are a type of high-performance permanent magnet material with a structure resembling the letter ‘U’. Manufactured from sintered neodymium-iron-boron, they are characterised by high magnetic energy product....
This is a radial 4-pole ring (Hollow cylinder) magnet, the material is bonded NdFeB, with high magnetic performance, the size is 16mm outer diameter, inner hole 5mm, height 20mm, surface gray epoxy treatment, suitable for water pump motor...
This product is a 4-pole ring magnet, injection-molded ferrite material, the sample size is 22mm outer diameter, 7mm inner diameter, 4mm thickness, 2 N poles and 2 S poles, mainly used for push rod motors, magnetic induction devices, encoders, etc.,...
This is a radial 2 pole circular magnet designed specifically for magnetic encoder chips. It is made of sintered neodymium-iron-boron with N35 grade performance and is suitable for standard environments....
This product is a multi pole magnetic ring with an inner diameter of 1.5mm. The material is injection molded ferrite. It adopts axial multi pole magnetization and is mainly used for DC motors. If you have a sample of similar injection molded magnetic products, please contact us for quotation....
This is a very small size rectangular block magnet with galvanized surface, 3mm length, 1.5mm width and height, with very fine tolerance, magnetized by lengthwise direction, mainly used in precision electronics, instrumentation, please contact us if you need to buy....