A soft magnetic measurement device is a precision instrument specifically designed to measure, analyze, and characterize the key static and dynamic magnetic properties of soft magnetic materials, such as electrical steel sheets, ferrites, amorphous/nanocrystalline alloys, and permalloy . It serves as an essential tool in both academic research and industrial production, providing critical data support for material R&D, process optimization, and quality control.

Its core working principle relies on generating controllable DC or AC magnetic fields through an excitation system, then using sensing components to detect the magnetic field strength (H) and magnetic flux density (B) of the tested sample . Based on Faraday's law of electromagnetic induction and high-precision data acquisition technology, it calculates and visualizes various magnetic parameters, including initial permeability, maximum permeability, saturation magnetic induction, coercivity, remanence, and specific total loss .

In terms of application scope, it is widely used in universities and research institutions for the R&D of new soft magnetic materials and integrated circuits ; in factory production lines, it is used for batch inspection of magnetic components to ensure product consistency . It also plays an important role in quality inspection institutions for standard-compliant testing and certification .

Different types of soft magnetic measurement devices are available to meet diverse needs, such as DC magnetic property testers, AC magnetic property testers, and comprehensive magnetic performance measurement systems that integrate both DC and AC measurement functions . These devices usually comply with international standards like IEC 60404 and ASTM, ensuring the accuracy and reliability of measurement results .