Ambient magnetic field shielding

Rendering of a zero Gauss chamber in empty white space.
  • Measuring point for reproducible and location-independent measuring results used for quality assurance, such as for cross-operational supply chains
  • Measurements of residual magnetism on ferromagnetic parts are no longer significantly distorted by the ambient magnetic fields
  • Passive shielding, no power consumption and maintenance-free
  • Defined measuring point, good access to the measuring room
  • Rugged platform design

Ambient magnetic field shielding

For location-independent reproducible measurement values

Residual magnetism measurement of a milling cutter in the zero Gauss chamber. Ambient magnetic fields are strongly shielded, the measurement result is not falsified and thus shows the residual magnetism of the component.
Measurement of residual magnetism of a milling cutter in the zero Gauss chamber. The demagnetized milling cutter has a residual magnetism of 0.1A/cm.
Residual magnetism Measurement of a milling cutter in front of the zero Gauss chamber. Ambient magnetic fields are no longer shielded, the measurement result is strongly falsified and shows the residual magnetism of the component with induced magnetisation.
Measurement of residual magnetism of the same cutter in the earth's magnetic field. The induced fields falsify the measurement result from 0.1A/cm to about 2.1A/cm

Measurements of residual magnetism on ferromagnetic parts in the range < 4 A/cm (~ 5 gauss) are typically significantly influenced by the induced earth’s magnetic field. Due to the geometry and permeability of the material, induced magnetic fields can be amplified several times over. Depending of the slim, elongated parts in the earth’s magnetic field (e.g. 0.4 A/cm), the measurement results may fluctuate by up to 4 A/cm at the same measuring point.

Component measurements inside the zero gauss chamber can be repeated at any location, allowing a global quality assurance between customers and suppliers.

The ambient magnetic field, which is greatly reduced by the high shielding factor from the chamber, enables accurate measurements in any orientation. This is particularly relevant for elongated parts and materials with high initial magnetic permeability.

Technical data*

Type NGK 17 NGK 21
Dimensions W 510 610
(mm) H 580 620
D 500 600
Dimension of the platform W 410 480
(mm) D 280 360
Weight kg 30 38
Shielding factor min 4.0 ( x=2.4 y=10.7 z=16.7) 4.0 (x=2.4 y=12.6 z=17.0 )
Zero-Gauss chamber with axis labeling for the shielding factors, relevant for measuring residual magnetism

* All informations are without guarantee