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Know your EMF
Alternating Current (AC) and direct current (DC), magnetic and electric fields, low or high frequencies, ionizing radiation, modulated and pulsed signals, time and code division multiplexing, wireless, WLAN and Bluetooth technologies have altered our electromagnetic environment significantly. We can assess your EMF environment.
For more information on services, testing and low EMF construction techniques visit www.EMFRF.com
High Frequency Radiation
is used for wireless signal transmission and usually referred to as radio frequency (RF) and microwave radiation. The strength of the field is expressed as Power density in nanoWatt per square centimeter (nW/cm2).
RF and Microwave Radiation
AM and FM radio, television and cell phones, portable phones and wireless computer networks utilize high frequency electromagnetic signals. Wireless cellular phone communication has significantly increased over the last decade... Cell sites are being established on commercial buildings, lamp posts and across from residential buildings. Careless in-house wireless network installations can become a significant source of Microwave radiation in a building. ET&T uses a spectrum analyzer to identify the specific frequencies present and the magnitude of the signals. We compare your building to our references values, international guidelines and standards.
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Low Frequency Alternating Currents (AC)
are associated with our electrical grid and power supply. AC currents change their polarity cyclically and the polarity changes per second are referred to as the frequency in Hertz (Hz). The electrical system in the US runs with a 60Hz frequency.
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AC Magnetic Fields
are created by electrical current flowing in a conductor (wire) and are commonly referred by the public as EMF’s. Common EMF sources are transmission lines, the electrical grid, building wiring system, transformers and appliances. However, high magnetic fields are often caused by flaws in a buildings internal wiring system and stray current traveling on water and gas lines and grounding systems. Magnetic fields (magnetic flux density) are commonly measured in milliGauss (mG). We conduct spot measurements, source identifications, long-term monitoring, provide mitigation specifications and management plans for you. |
AC Electric Fields
are present when a voltage is present on the electrical grid, wiring or power cord, but no current flow is necessary. Electric fields are not easily measured because the test person diverts the fields and influences the measurement result. Electric fields are measured in V or V/m and are usually easily shielded. |
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| Direct Currents (DC) are electrical currents which have constant flow of electric charge and do not have a changing polarity and therefore a zero (0) Hz frequency. |
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DC Magnetic Fields are static magnetic fields such as are present in magnets. The earth, for example, has a strong magnetic field which can be shown through a compass. The earth magnetic field is relatively homogeneous. However, deviation or sudden changes can occur through earth fault lines or even magnetized steel beams in buildings.
DC Electric Fields (Electrostatic charge) can be created when two poorly conducting materials rub against each other. For example, a shoe sole rubbing over the synthetic carpet can create an electrostatic charge which can discharge with a shock. Electromagnetic charge is measured in Volts per meter (V/m) and discharge time. |
Ionizing Radiation
 Radioactive materials have a significant impact on human health. Ionization radiation, if enough occurs, can be destructive to biological organisms, can cause DNA damage in individual cells and is responsible for numerous cancers. Materials high in ionizing radiation have been found in some ceramic tiles and certain stone used in countertops in residential buildings. We can identify elevated levels for you. |
