Specific Absorption Rate (SAR) is a measure of the amount of RF energy absorbed by the human body when using a mobile device, and is currently the industry safety standard for measuring the RF emissions of many wireless devices. In addition to FCC in the United States, CE in the European Union, and ANFR in France, the mandatory national standard GB21288-2022 "Electromagnetic Radiation Exposure Limits for mobile communication Terminals" jointly prepared by China Academy of Information and Communication Sciences and China National Institute of Metrology was officially released on December 29, 2022. The standards will be implemented on January 1, 2024. This marks the beginning of the SAR sensor becoming "standard" for phones and tablets.

Tianyihexin SAR sensor are small size, low power consumption and fast response. When applied to the mobile phone, the SAR signal pin will be connected to the mobile phone antenna. When the human body is near the antenna, the SAR sensor will report the corresponding approach signal, and the driver will reduce the power according to the approach sign to meet various SAR standards.

In addition to mobile applications, SAR can also be used on wearable devices such as headphones and wristbands. When the bracelet is used by customers, it can be used for wearing detection; When used by headset customers, it can be used as a sliding key or touch key.

Tianyihexin SAR sensor has simple peripheral circuit, strong IO compatibility and perfect driver, which can help customers quickly complete debugging and promote mass production schedule.