EMF Measurement

Electrical Panels on Building

EMF Measurement Surveys

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EMF measurement surveys are usually conducted for one of the following applications:

Evaluation of a commercial space where equipment is being adversely affected by building electrical systems or other interference (EMI) sources, or where concern about human exposure exists.

Land Use Planning - Site assessment of an open tract to evaluate the impact of power lines or adjacent TV, radio, and cell site transmitters, and to provide guidance in the placement of new construction.

Evaluation of a residence from an exposure assessment perspective.

Assessment of human exposure to industrial RF sources such as heat sealers, dielectric seam welders, induction heating equipment, or microwave dryers.

For power frequency magnetic fields, different types of survey are offered, depending upon the client's needs. Mapped surveys are suitable for most commercial applications and assessment of outdoor areas near power lines. Data is recorded by a sampling gaussmeter, and processed to produce multicolor 2-Dimensional and 3-Dimensional presentations of field strength. We use top quality professional equipment, calibrated periodically by the manufacturer, to ensure the highest degree of accuracy.

Radio frequency, microwave, and cell site surveys are discussed on another page of this site: RF Exposure Measurements.

Timed Field Logging

The fully documented reports that we furnish our clients are an important part of each survey, and provide a point of reference for understanding the significance of measurement data. Each report references applicable exposure standards and equipment interference thresholds. The ultimate goal of our surveys is to place you in a position to make a responsible and informed decision about the area under evaluation, and to understand the options available for field remediation.

Each professional EMF survey includes a full identification of the source or sources of elevated magnetic fields, radio frequency fields, or electromagnetic interference (EMI). This often requires evaluation of feeder imbalance, neutral current diversion, and other net current sources. An analysis of electrical wiring and grounding systems from the standpoint of field production is an essential part of a comprehensive measurement survey. The power control and distribution equipment in commercial buildings can also produce extremely high field intensities even when circuits are balanced and operating properly. Some EMI investigations involve RFI (radio frequency interference) measurements as well. This information is factored into our field management recommendations. The experience gained from hundreds of surveys over the years is an important part of the quality that we offer you.

Office EMF Survey

Measurement Survey near Power Line

Land Use Survey Plot


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