What Magnets Are Best for Automation Sensor And Rotary Detection Devices?

Diametrically magnetized disc and cylindrical NdFeB magnets are the ideal core components for industrial automation and rotary detection sensor. Different from conventional axially magnetized magnets, these precision magnets have N poles and S poles distributed on the curved side walls. When rotating, they produce regular and stable magnetic field changes, allowing Hall sensor chips to achieve non-contact, high-precision detection of angle, rotational speed and position.

For conventional indoor and room-temperature sensing equipment, N42, N45 and N48 grade sintered neodymium magnets are the mainstream choice. They feature high flux density, consistent magnetic stability , perfectly matching demands of standard sensors. For high-temperature working environments in automotive electronics and industrial automation systems, H and SH high-temperature resistant grades including N42SH and N45SH are prioritized, effectively avoiding magnetic demagnetization and ensuring long-term stable sensing performance.

Widely applied in precision detection fields, these NiCuNi plated diametric magnets fit magnetic rotary encoders, Hall angle sensors, speed sensors and rotary potentiometers perfectly. They also support knob position detection, robot joint position feedback, as well as water meter and gas meter flow sensing modules.

With compact structure, reliable magnetic strength and high temperature adaptability, diametrically magnetized NdFeB magnet remains the most reliable magnetic solution for modern automated rotary sensing devices.