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Knife sharpener

Belongs to:
Kitchenware and household appliances

A knife sharpener is an electrical device for sharpening the blades of a knife. The alternating electric and magnetic fields at the fundamental frequency of 50 Hz resp. 60 Hz are caused by the motor rotating the grinding wheel.

Frequency ranges:
  • 50–60 Hz
Type of field:
electric and magnetic

Measurements (acc. to literature)

Measurand Value Feature Remarks
magnetic flux density 1.002 mT (maximum, calculated) - at the surface of the device at 50 Hz [1]


  1. Leitgeb N et al. (2008): Magnetic emission ranking of electrical appliances. A comprehensive market survey.