Frequently Asked Questions
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Q: What is the MPR II certification?

A:

In 1987, the Swedish National Board for Measurement and Testing (MPR) generated a set of safety standards known as MPR I. This regulated the electrical component of very low frequency (VLF) emissions. In 1991, a more stringent standard, MPR II, was adopted that covers the levels of magnetic and electrical fields in both the VLF and extremely low frequency (ELF) ranges. One aspect of both standards is that there are no scientific studies that state whether or not the recommended MPR I or MPR II levels are hazardous.

SWEDAC MPR II standard

Type of Field Frequency Range Recommended Level
Magnetic ELF (5 hertz (Hz) - 2 kilohertz (kHz)) < 250 nanoteslas (nT)
VLF (2 kHz - 400 kHz) < 25nT
Electrical ELF (5 Hz - 2 kHz) < 25 volts per meter (V/m)
VLF (2 kHz - 400 kHz) < 2.5 V/m

Tesla: A measure of magnetic flux density in the meter-kilogram-second (mks) system equivalent to one weber per square meter.