Electromagnetic Fields (EMF)

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Electromagnetic fields (EMF) are areas of energy that surround electrical devices and wiring. In occupational settings, EMF exposure arises from power lines, industrial equipment, welding operations, radiofrequency equipment, and medical devices such as MRI machines. EMF is broadly categorized into extremely low frequency (ELF-EMF) from power systems (50/60 Hz) and radiofrequency/microwave fields from wireless and communications equipment. Potential health effects from prolonged high-level exposure include biological tissue heating and, for ELF-EMF, possible associations with certain cancers (IARC Group 2B for ELF magnetic fields). Industrial hygienists measure field strength in volts per meter (V/m) and microtesla (μT) or milligauss (mG).

EMF meters measure electric and magnetic field strength to assess worker exposure against limits such as ICNIRP guidelines or IEEE C95.1, and to document conditions near high-voltage equipment, substations, and industrial motors. Choose a broadband EMF meter when you need to evaluate exposure across a wide frequency range in a single survey, rather than an RF-specific meter designed only for telecom or antenna site work. Our rentals include WaveControl SMP2 and SMP3 meters with interchangeable probe configurations covering DC through 60 GHz, annually calibrated and functionally tested before shipment, with guidance on probe selection and orientation for your specific frequency range. If you are unsure which probe combination fits your application, our technical team can help match the setup to your frequency range and exposure standard so your results hold up in reporting.

Regulatory Exposure Limits

As of March 09, 2026

OSHA PEL
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NIOSH REL
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ACGIH TLV
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