Specific Absorption Rates (SAR) for mobile phones (2024)

FAQs

Specific Absorption Rates (SAR) for mobile phones? ›

The SAR is a value that corresponds to the relative amount of RF energy absorbed in the head of a user of a wireless handset. The FCC limit for public exposure from cellular telephones is an SAR level of 1.6 watts per kilogram (1.6 W/kg).

SAR must not exceed 2 Watts per kilogram

In order to avoid adverse health effects, the specific absorption rate of a mobile phone must not exceed 2 Watts per kilogram. Since 1998 this value is recommended as a limit by the International Commission on Non-Ionizing Radiation Protection ( ICNIRP ).

The guidelines include a substantial safety margin designed to assure the safety of all persons,regardless of age and health. The radio wave exposure guidelines use a unit of measurement known as the Specific Absorption Rate, or SAR. The SAR limit for mobile devices is 1.6 W/kg.

Skin and bone have a SAR worth of 2.20 W/kg and 1.80 W/kg while the brain has 1.40 W/kg. The electromagnetic energy burned-through on the human head from PIFA radio wire is assessed. At 900 MHz working repeat, the SAR regard assessed in the skin over 1 g volume of tissue is 3.50 W/kg.

A whole-body average SAR of 0.4 W/kg has been chosen as the restriction that provides adequate protection for occupational exposure. An additional safety factor of 5 is introduced for exposure of the public, giving an average whole-body SAR limit of 0.08 W/kg.

Quick SAR value check using your phone's dialer

To do this, open the Phone app and enter the USSD code for SAR value. For Android users, dial *#07#, while iPhone users should dial *#07# and tap on RF Exposure.

The FCC limit for public exposure from cellular telephones is an SAR level of 1.6 watts per kilogram (1.6 W/kg).

Federal Communications Commission (FCC) in the US has set an SAR level of 1.6 W/Kg for phones and the same measurement is followed in India. This means phone below 1.6W/kg are considered good.

The specific absorption rate (SAR) is a measure of the rate of energy deposition within a given mass of tissue (units = watts/kilogram = W/kg). Deposition of energy created by radiofrequency (RF) pulses is dissipated as heat in the surrounding tissue.

What is the SAR Specific Absorption Rate test? ›

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. SAR provides a straightforward means for measuring the RF exposure characteristics of cell phones to ensure that they are within the safety guidelines set by the FCC.

While there has been a lot of talk about the phones with high SAR (specific absorption rate) value can potentially damage the body at a cellular level, particularly when you hold the phones against your ears and talk on them, not enough attention has been paid by smartphone users to the damage that these devices the ...

Mobile Handsets –

India has adopted the most stringent international norms for mobile handsets. All the new designs of mobile handsets shall comply with the SAR values of 1.6W/kg averaged over 1 gram of human tissue w.e.f. 1^st2012.

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.

Head SAR measures radiation absorption when the device is held close to the head during a call. Body SAR measures absorption when the device is held close to the torso, like in a pocket.

Federal Communications Commission (FCC) in the US has set an SAR level of 1.6 W/Kg for phones and the same measurement is followed in India. This means phone below 1.6W/kg are considered good.

3 technical standard defines limits for whole-body average SAR (normal mode: 2 W/kg, first-level controlled mode: 4 W/kg), which is used for large-volume body RF coils commonly used for transmission at 1.5 T and 3 T.