# Electromagnetic radiation measurements

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## Main Question or Discussion Point

What does a measure of 2000 µW/m² electromagnetic radiation by "Hf35c Rf Analyze (800mhz – 2.5 Ghz)" radiation meter mean? Is it too high?

see this link: https://www.electrahealth.com/hf35c-radio-frequency-meter.html

it shows that “1000 or more µW/m²” in the meter is “Extreme Concern”, does it mean that it is a high radiation or dangerous in the long term?

## Answers and Replies

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tech99
Gold Member
What does a measure of 2000 µW/m² electromagnetic radiation by "Hf35c Rf Analyze (800mhz – 2.5 Ghz)" radiation meter mean? Is it too high?

see this link: https://www.electrahealth.com/hf35c-radio-frequency-meter.html

it shows that “1000 or more µW/m²” in the meter is “Extreme Concern”, does it mean that it is a high radiation or dangerous in the long term?
The international recommendations for non ionising radiation, published by ICNRP, may be found here:https://www.icnirp.org/
For a frequency of 1 GHz they give a maximum of 5W/m^2 for general public exposure, and 2000 uW/m^2 is well below this figure. There is a lot of "witchcraft" surrounding this subject, by the way. I don't know if your meter is trustworthy - does it have a calibration certificate?

sophiecentaur
Science Advisor
Gold Member
What does a measure of 2000 µW/m² electromagnetic radiation by "Hf35c Rf Analyze (800mhz – 2.5 Ghz)" radiation meter mean? Is it too high?

see this link: https://www.electrahealth.com/hf35c-radio-frequency-meter.html

it shows that “1000 or more µW/m²” in the meter is “Extreme Concern”, does it mean that it is a high radiation or dangerous in the long term?
Could you be a bit more specific about your interest in this? Do you need to assess the level of exposure under a particular circumstance?
As @tech99 says, there is a lot of witchcraft in this topic. The human body is affected differently in different situations, according to the surroundings. You have to remember it's hard enough to measure RF Field Strength accurately out in the open. Any figures you can get for assessing power that's actually incident on a person in the work situation are very 'plus and minus a lot'.
People charge a lot of money to give their opinion about the hazards in real life situations. Most of the equipment is very suspect when dealing with wavelengths that are longer than around a few cm because the body acts like a badly designed antenna.

The heating effect of 2mW per metre squared is very low. Direct sunlight is nearly 1kW per metre squared, for instance. Standing waves can increase local field levels (as in microwave ovens and burned regions inside bread etc.) But standing waves in wet meat (your body) are not high.