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General The SAR value explained

Discussion in 'Android Devices' started by rahules, Oct 2, 2011.

  1. rahules

    rahules Well-Known Member
    Thread Starter

    There are a lot of people saying the SAR values is high and that is the only reason they are not buying the phone. Well, here are some facts about SAR.

    What is SAR

    SAR stands for Specific Absorption Rate, which is the unit of measurement for the amount of Radio Frequency (RF) energy absorbed by the body when for example using a mobile phone, walkie talkie, or working in very close to radio communication transmitting antennas. SAR is expressed in units of watts per kilogram (W/kg).

    Does the SAR for a mobile phone vary when in use?

    Yes. Although the SAR is determined at the highest certified power level in laboratory conditions, the actual SAR level of the phone while operating can be well below this value. This is because mobile phones use adaptive power control to reduce the transmitted power to the minimum possible whilst maintaining good call quality.

    Once a call is established the mobile phone will power down to the minimum level required. Therefore, the closer you are to a base station and the better the reception, the lower the actual SAR level.

    Does SAR vary between mobile phones?

    Yes. The maximum SAR level for different mobile phone models can vary and this is primarily due to where the antenna in the phone is located. The International EMF Guidelines from ICNIRP are designed to protect people of all ages including children and incorporate large safety factors.


    Are low SAR mobile phones safer?

    No. Variations in SAR do not mean that there are variations in safety. While there may be differences in SAR levels among phone models, all mobile phones must meet RF exposure guidelines.

    SAR levels can also vary considerably when in use depending on how good the reception is. Once a call is established the mobile phone will power down to the minimum level required to reach the network and maintain a quality call.

    Please check emfexplained.info//?ID=25585 for more information.
    Source : Given above


    theperfectpunk likes this.
  2. sunil90

    sunil90 Well-Known Member

    Sep 28, 2011
  3. rahules

    rahules Well-Known Member
    Thread Starter

    I don't think you are getting the point here...
    high sar values doesnot mean that it is very bad. if you have good reception, a phone with lower sar and high sar value will be emitting almost same amount of radiation
  4. theperfectpunk

    theperfectpunk Well-Known Member

    Aug 8, 2011
    Good post!

    SAR is the maximum energy that a phone can absorb, it does not affect the safety as it depends on the radio antenna only what frequency energy it is emitting. The SAR values determine only the maximum that can be absorbed which means the phones the phone will absorb the amount of radio frequency energy emitted by antenna only they, so safety depends on the radio frequency energy of the antenna only not on the phone.

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