Residual magnetism

Keighley Labs covers many mainstream NDT methods, such as magnetic particle crack detection, dye penetrant testing, ultrasonic flaw detection, magnetic permeability, positive material identification, residual magnetism and ferrite determination, and subcontract radiography.

The main disadvantage of this system is uncertain and, probably, low-level residual magnetism of the generator in the self-excitation beginning that reduces reliability of the system.

C&K's high reliability connectors meet stringent outgassing and residual magnetism requirements, and conform to a number of ESA and MIL qualifications and quality levels.

To ensure accurate measurement of low-level current, you need to eliminate residual magnetism by demagnetizing the magnetic core.

Once released, most ferrous objects quickly lose all measurable traces of this residual magnetism. The small physical shocks associated with releasing a part will usually demagnetize it instantly.

These digital valves use the principle of residual magnetism to open and close working at blinding speeds and consuming minimum energy.

Diaphragm studs were machined at NIST from Type 316 stainless steel and annealed to minimize residual magnetism before being sent to the pump manufacturer for incorporation into finished diaphragms.

Advances in chuck technology include improved permanent magnet materials; pole extensions and other devices that allow five-side machining, chucking of unusual workpiece configurations, and minimize distortion; and controls that permit variable magnetic power and minimize residual magnetism.

At ambient temperatures the compounds are essentially diamagnetic, with low residual magnetism arising from defects.

If Martian rocks retain some residual magnetism from an ancient field, that magnetism may reverse the path of solar-wind electrons heading toward the planet.