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Coffee grinder

Belongs to:
Kitchenware and household appliances
Synonyms:
Coffee mill
Description:

A coffee grinder is an electrically driven kitchen device for grinding roasted coffee beans. The alternating electric and magnetic fields at the fundamental frequency of 50 Hz resp. 60 Hz are caused by the motor rotating the knives.

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

Measurements (acc. to literature)

Measurand Value Feature Remarks
magnetic flux density 0.04–1 µT - - [1]
magnetic flux density 0.07 µT (measured) - at a distance of 100 cm; measurement bandwidth: 40 - 800 Hz [2]
magnetic flux density 0.28 µT (measured) - at a distance of 50 cm; measurement bandwidth: 40 - 800 Hz [2]
magnetic flux density 0.6 µT (mean, measured) - during usage [1]
magnetic flux density 2.47 µT (measured) - at a distance of 5 cm; measurement bandwidth: 40 - 800 Hz [2]

References

  1. Mezei G et al. (2001): Household appliance use and residential exposure to 60-Hz magnetic fields
  2. Preece AW et al. (1997): Magnetic fields from domestic appliances in the UK