Understanding SAR Value: What It Is, Its Harmfulness, and How to Check Your Phone's SAR Value

Definition of SAR Value

Specific Absorption Rate (SAR) is a critical measure used to quantify the rate at which the human body absorbs electromagnetic energy from mobile devices, particularly smartphones. SAR is typically expressed in watts per kilogram (W/kg).

As a regulatory standard, SAR values are used to evaluate the potential health impacts of RF (radiofrequency) energy exposure. Regulatory bodies such as the Federal Communications Commission (FCC) in the United States set a maximum SAR limit of 1.6 W/kg for mobile devices. Similarly, the International Commission on Non-Ionizing Radiation Protection (ICNIRP) has established a limit of 2.0 W/kg.

The Harmfulness of SAR

Despite extensive research, no definitive evidence has conclusively linked typical mobile phone use to significant health risks. However, some studies have suggested a potential correlation between RF exposure and certain health issues, necessitating precautionary measures, especially for those with children or heavy users.

Mobile devices emit non-ionizing electromagnetic radiation, which can have both thermal and non-thermal effects on the human body. Thermal effects are due to the heat generated by this radiation, while non-thermal effects include fatigue, sleep disturbances, dizziness, and a reduction in mental attention span.

Checking Your Phone's SAR Value

From the User Manual

The SAR value for your device is often listed in the user manual provided with the phone. This manual is a primary source of detailed information about the device's specifications, including its SAR value.

On the Manufacturer's Website

Alternatively, you can find your phone's SAR value on the manufacturer's website, under product specifications or safety information. Many manufacturers maintain a comprehensive database of their products' safety information.

Through the FCC Database (USA)

In the United States, you can access the FCC’s database to find SAR ratings for specific models. This database is accessible online, and you can search for your device by entering its name or model number.

If you're concerned about RF exposure, consider using hands-free devices or speakerphone options to minimize direct contact with the head and body.

How to Check Your Phone's SAR Value

To check the SAR value on your phone, dial the USSD code 07. The threshold value for radiation levels is 1.6 W/kg.

If the SAR value is less than 1.6 W/kg, it is considered safe to use that phone. If the SAR value exceeds this threshold, take necessary steps to avoid or mitigate the effects of radiation.

Regularly monitoring and understanding your phone's SAR value is crucial for ensuring that you and your family use mobile devices safely. By staying informed about these safety measures, you can make more informed decisions about your technology usage.