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Pencil sharpener

Belongs to:
Computer and office devices
Synonyms:
Parer, Topper
Description:

A pencil sharpener is a mechanical device for sharpening a pencil's writing point. Pencil sharpeners can be operated manually or by an electric motor and the latter produces electric and magnetic fields.

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

Measurements (acc. to literature)

Measurand Value Feature Remarks
magnetic flux density 0.2 µT (mean, measured) - at a distance of 1.22 m [1]
magnetic flux density 0.5–3 µT (min-max value, measured) - at a distance of 60.96 cm [1]
magnetic flux density 0.8–9 µT (min-max value, measured) - at a distance of 30.48 cm [1]
magnetic flux density 2–30 µT (min-max value, measured) - at a distance of 15.24 cm [1]
magnetic flux density 2 µT (mean, measured) - at a distance of 60.96 cm [1]
magnetic flux density 3 µT (maximum, measured) - at a distance of 1.22 m [1]
magnetic flux density 7 µT (mean, measured) - at a distance of 30.48 cm [1]
magnetic flux density 20 µT (mean, measured) - at a distance of 15.24 cm [1]

References

  1. EPA (1992): EMF in your Environment- Magnetic Field Measurements of Everyday Electrical Devices.