RF Exposure Measurements & Testing Cell Towers Part 1

Cell Towers, RF Exposure

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The popularity of cell phones and wireless communication devices has resulted in a proliferation of cell towers across the American landscape. Opposition to the placement of these towers has sometimes developed among segments of the population, usually based upon aesthetics, concern over the electromagnetic radiation, or both. http://www.emfnews.org/store/home-cell-phone-and-mobile-tower-radiation-meters.html

EMF Services can conduct testing and site assessments for individuals, schools, businesses, or municipalities who wish to become aware of the RF levels at a location near cell phone or broadcast towers. The report that we provide will permit comparison of measured levels with FCC Maximum Permissible Exposures (MPEs), precautionary guidelines, and routine background levels for comparable environments. If new antennas or towers are planned for your location, our site survey can be used to establish a baseline RF level for later comparison (before and after testing). Follow-up readings are provided at substantially reduced cost compared to the initial survey.

The purpose of this testing is to empower you to make responsible, fact-based decisions about the RF environment surrounding your community, facility, home, or school. We use advanced equipment to perform the most accurate and comprehensive RF exposure assessments in the industry. All services are delivered by personnel with several years of experience in planning and directing the installation of radio communication facilities, using equipment with current factory calibration certificates. If exposure reduction measures are desired, recommendations will be included in the report. The greatest advantage of our surveys over that of other providers is the ability to address the issue of low-level, long-term, non-thermal exposures, and to articulate the scientific rationale for a precautionary exposure guideline.

EMF Services no longer performs standard RF compliance surveys. We provide only enhanced testing services that involve more detailed data collection, and a more extensive and broader coverage report, than a conventional compliance survey. Our surveys incorporate procedures and equipment to separately measure cellular power density, in addition to the composite power density (the combination of all RF signals present). We use top quality professional equipment, and extensive procedural safeguards, to ensure the highest degree of RF measurement accuracy.

The purpose of our testing services is not to provide a basis for contesting the siting of cell phone towers or to seek their removal once sited. This position is not the result of an alliance between EMF Services and the cellular service providers. They are not our clients. Rather, it represents an effort to avoid leading you down the path toward a disappointing result. The RF levels near a cell tower will not approach Maximum Permissible Exposures at ground level where people are present. Therefore, from a legal perspective, grounds for such an action do not exist. Further, a court of law is not the best venue for a challenge to the science on which existing standards are based. The likely result is disappointment and a wasted financial expenditure. The best reason for testing and measurement services is to understand the field levels that exist, and what can be done to reduce them.

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4 Factors That Can Reduce Cell Phone Radiation Part 1

Cell Phone Radiation, Cell Phone Radiation Protection

4 Factors That Can Reduce Cell Phone Radiation Part 2

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Cell Phone Towers Health Effects

Cell Phone Sensitivity

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By Amy Rosenthal / EWG Enviroblog

Research is not yet settled on exactly how dangerous cell phone radiation is to your health. But we at Environmental Working Group have seen enough studies with enough troubling results that we think it’s worth your while to reduce your exposure to cell phone radiation. http://www.emfnews.org/store/home-cell-phone-and-mobile-tower-radiation-meters.html

When we talked a few weeks ago about insufficient government cell phone regulations, we discussed “SAR” values and the legal limits the government has set for the amount of radiation a phone can emit. But SAR values aren’t always easy to pin down – so today we’re going to look closely at what they are and how they can vary by phone.

What does SAR mean, anyway?

“SAR” stands for “specific absorption rate” – it’s a measure of how much radiation is absorbed by your body, given in Watts per kilogram (W/kg). Scientists test for SAR values using models of the human body filled with viscous fluid designed to mimic human tissue. The phone is placed next to the mold, and while the phone transmits a signal, a probe inside the human model measures the absorbed energy levels. The phone’s SAR value is designated as the highest amount of radiation detected during these tests.

What determines a phone’s emission level?

A phone’s SAR value is largely determined by the design of its inner hardware and antenna. But, since the SAR measures how much radiation is absorbed by your body (heartening, huh?), the value is determined by both a) the amount of radiation emitted by the phone, and b) what body part is doing the absorbing (yes, some absorb radiation more than others).

SAR values for an individual phone can vary, based on several factors:

Network & frequency

Most phones sold today can operate on several networks (e.g. 2G v. 3G) and at different frequencies (which band of the network the phone is using to send and receive signals). The same phone can emit different levels of radiation depending on which network and which frequency it’s being used on at any given time.

Where you’re using it

Phones emit radiation when they’re transmitting signals from your handset to a base station (cell tower), so the harder a phone has to work to send a signal, the more radiation it will emit. As a result, when you’re using your phone far from a base station (say, in a rural area) or if there are physical obstacles in the way, the SAR value would be higher.

How you’re using it

A phone also uses more power to transmit a voice signal, so texting emits less radiation than talking.
Where you’re holding it Originally, SAR measurements focused primarily on values when held at the head. But over time, cell phone use has changed – now we’re carrying phones in our pockets and often leaving them there while talking on a headset or not using them.

This means less radiation to the brain (that’s good) but more to the lower torso. SAR values vary based on the type of body tissue absorbing the radiation, and research has shown that skin and muscles absorb more radiation than fat and bones. This raises concern about exposures at the waist, particularly to reproductive organs that don’t have a protective layer of bone (like a skull provides the brain) shielding them from cell phone radiation. http://www.emfnews.org/store/home-cell-phone-and-mobile-tower-radiation-meters.html

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