https://devzone.nordicsemi.com/f/nordic-q-a/10462/nrf51-module-sar-certification-for-wearableAre there any modules/devices with sar certification for the nrf51? I have a need for something that will be placed with an elastic band against the arm or upper torso. The module needs to collect and transmit multiple-sensor data every 5-10 secondsen-USTelligent Community 13Wed, 25 Nov 2015 12:53:07 GMThttps://devzone.nordicsemi.com/thread/38881?ContentTypeID=1Wed, 25 Nov 2015 12:53:07 GMT137ad170-7792-4731-bb38-c0d22fbe4515:21bdbbb1-0709-4a78-95e7-f7e93253fcc6alonso<p>I am sure it would pass the certification process but I was hoping to have a module that would let us avoid having to do SAR ourselves.</p> <p>I guess an exception may apply if the transmission power can be configured low enough and still reach the data collector.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/38880?ContentTypeID=1Wed, 25 Nov 2015 09:29:19 GMT137ad170-7792-4731-bb38-c0d22fbe4515:dc541405-f3d3-4538-afb1-30917c0572b5Einar Thorsrud<p>I am not aware of any nRF51 modules with <a href="https://en.wikipedia.org/wiki/Specific_absorption_rate">SAR</a> certification.</p> <p>Compared to a UMTS Cell phone which transmits at up to 33 dbm (2 W), the nRF51 transmit at a fraction of this at maximum of 4 dbm (2.5 mW). TX power can be configured down to -30 dBm. Thus the SAR will be so small that it is probably not relevant for most applications, not even wearable devices.</p><div style="clear:both;"></div>