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Coffee machine

Belongs to:
Kitchenware and household appliances
Description:

A coffee machine is an electrically driven kitchen appliance for making coffee, using principles of thermal extraction and filtration. The alternating magnetic field at the fundamental frequency of 50 Hz resp. 60 Hz is caused by the electrically driven heating process heating water inside the heating pump.

Unless otherwise stated, the operating frequency confirms with measured frequency, i.e. the measurement was performed at the operating frequency of the coffee machine.

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

Measurements (acc. to literature)

Measurand Value Feature Remarks
magnetic flux density 0.001885 µT (mean, measured) - spatially averaged value at distances from 30 cm - 3.05 m [1]
magnetic flux density 0.1 µT (maximum, measured) - at a distance of 30.48 cm [2]
magnetic flux density 0.01–0.04 µT (mean, measured) - at a distance of 1 m
magnetic flux density 0.02 µT (mean, measured) - average value of 2 coffee machines at a distance of 100 cm; measurement bandwidth: 40 - 800 Hz [3]
magnetic flux density 0.03 µT (maximum, measured) - at a distance of 80 cm [4]
magnetic flux density 0.06 µT (mean, measured) - average value of 2 coffee machines at a distance of 50 cm; measurement bandwidth: 40 - 800 Hz [3]
magnetic flux density 0.1–0.2 µT (mean, measured) - at a distance of 30 cm
magnetic flux density 0.19 µT (mean, measured) - during usage [5]
magnetic flux density 0.2 µT (maximum, measured) - at a distance of 40 cm [4]
magnetic flux density 0.4–1 µT (measured) - at a distance of 15.24 cm [2]
magnetic flux density 0.57 µT (mean, measured) - average value of 2 coffee machines at a distance of 5 cm; measurement bandwidth: 40 - 800 Hz [3]
magnetic flux density 0.7 µT (mean, measured) - at a distance of 15.24 cm [2]
magnetic flux density 1–10 µT (maximum) - at a distance of 3 cm
magnetic flux density 4 µT (maximum, measured) - directly in front of the device [4]
electric field strength 60 V/m (maximum) - at a distance of 30 cm [6]

References

  1. Mader DL et al. (1992): Residential exposure to 60-Hz magnetic fields from appliances.
  2. EPA (1992): EMF in your Environment- Magnetic Field Measurements of Everyday Electrical Devices.
  3. Preece AW et al. (1997): Magnetic fields from domestic appliances in the UK.
  4. Farag AS et al. (1998): Electromagnetic fields in the home.
  5. Mezei G et al. (2001): Household appliance use and residential exposure to 60-Hz magnetic fields.
  6. No authors listed (2018): [Radiation and radiation protection]