Test Platform
Precision measurement of feebly magnetic materials
The model PFMM (Permeameter for Feebly Magnetic Materials) is an instrument to verify that a non-magnetic material (for example austenitic stainless steel) is really "non-magnetic".
The permeameter PFMM quantifies the magnetic"weakness"of the material by measuring its magnetization curve, relative permeability μr and susceptibility χ. When a non-magnetic material is used in an application where the interaction with magnetic fields must be very low, the control of its magnetization and permeability is fundamental.
The permeameter PFMM measures the relative permeability in the range between 1.001 and 4, with a typical total accuracy less than ±2%. When low values of permeability and susceptibility are required, the Laboratorio Elettrofisico PFMM is necessary tool.
The sensitivity of the coil must be very high: for example, the PFMM can accurately measure the susceptibility of good stainless up to 108 times lower than the susceptibility of a typical Fe-Ni, that can be measured with a permeameter for ferromagnetic materials.
Measurements are taken in compliance with ASTM 342 and IEC 60404-15 standards.