What is SAR value? Sar Value effect on Human Body

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1. What is SAR?
Specific Absorption Rate (SAR) is the rate at which electromagnetic power radiated from mobile handsets and towers is absorbed by the human body.

2. What is a SAR value?
SAR Value is a measure of the maximum energy absorbed by a unit of mass of exposed tissue of a person using a mobile phone, over a given time or more simply the power absorbed per unit mass. SAR values are usually expressed in units of watts per kilogram (W/kg) in either 1g or 10g of tissue.

Every mobile phone model is tested for radio wave emissions. Using an internationally standardized method that meets government and regulatory requirements, a measurement is made to determine how much electromagnetic energy is absorbed by body tissue. This gives the SAR (specific absorption rate) value.

Governmental and regulatory agencies have established SAR limits under which cell phone use has been determined by them to be safe.

3. What is SAR Limit in India?
The Inter-Ministerial Committee on EMF Radiation set up by the Ministry of Communications and Information Technology had suggested stricter SAR limits (2 watt per kg) for mobile handsets.

While acknowledging the sensitivity of health related effects of radiation emissions from mobile towers and the recent concern raised by World Health Organization, the Indian Government has decided to set the new SAR limits to 1.6 watt per kg. This would make the Indian standards closer to the US standards prescribed by the FCC (Federal Communication Commission) where the permissible SAR levels are set at or below 1.6 watt per kg taken over a volume containing a mass of 1 gram of tissue.

4. How is SAR harmful for Human Body?
A high level of SAR is known to have ill effects on humans.

5. SAR For Cell Phones: What It Means For Me?
There is considerable confusion and misunderstanding about the meaning of the maximum reported Specific Absorption Rate (SAR) values for cell phones (and other wireless devices). SAR is a measure of the rate of RF (radiofrequency) energy absorption by the body from the source being measured – in this case, a cell phone.

Many people mistakenly assume that using a cell phone with a lower reported SAR value necessarily decreases a user’s exposure to RF emissions, or is somehow “safer” than using a cell phone with a high SAR value. While SAR values are an important tool in judging the maximum possible exposure to RF energy from a particular model of cell phone, a single SAR value does not provide sufficient information about the amount of RF exposure under typical usage conditions to reliably compare individual cell phone models.

6. So how safe are mobile phones?
There is concern at the moment over the use of cellular phones and their possible health implications. All the research is inconclusive so the bottom line is, cellular phones may be a potential health hazard.

Different cell-phone models emit different amounts of radiation, so one way to reduce your exposure is to purchase a cell phone with a lower SAR (specific absorption rate), a number that indicates how much radiation is absorbed by the human body when the handset is being used at maximum power.

The FCC requires cell phone manufacturers to ensure that their phones comply with these objective limits for safe exposure. Any cell phone at or below these SAR levels (that is, any phone legally sold in India) is a "safe" phone, as measured by these standards. The FCC limit for public exposure from cellular telephones is an SAR level of 1.6 watts per kilogram (1.6 W/kg).

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