Ultraviolet UV sensor explained

A month ago, SamMobile exclusively confirmed the existence of an ultraviolet UV sensor on Samsung’s upcoming flagship device, the Galaxy Note 4. Unfortunately, at that time we didn’t have much information about the sensor itself, so we weren’t able to confirm anything else except its existence. However, now we know everything there is to know about the UV sensor, and also how it has been implemented on the Galaxy Note 4.
Samsung initially started showing interest in the health and fitness category with its 2013 flagship device, the Galaxy S4. The GS4 was the first device to feature Samsung’s S Health application. Unfortunately, Samsung had packed so many confusing and impractical features in it that it became bloated and many consumers ended up not using the service at all. However, with the Galaxy Note 3, the Korean giant took consumers’ advice and finally cut down on all of the useless features.
With the launch of the Galaxy S5, one of Samsung’s key features was health and fitness. However, all recent smartphones had the same sensors and were able to track the same data, so the Korean giant went ahead and equipped the Galaxy S5 with a heart-rate sensor – an industry first. Now it’s doing the same thing again, this time with an ultraviolet UV sensor in its upcoming flagship device.
The Galaxy Note 4 will be the world’s first smartphone to sport an ultraviolet UV sensor, and its functionality will be incorporated within Samsung’s S Health app. The sensor will be used to measure the sun’s ultraviolet (UV) radiation and prevent users from damaging their skin, ageing it prematurely, and increasing their risk of skin cancer by giving recommended guidance based on the current UV index level at that particular place and time. To actually measure the UV radiation, users will need to maintain over 60 degree angle of elevation towards the sun against the back of the sensor.
There are a total of 5 UV index levels: Low, Moderate, High, Very High and Extreme, and users will be presented with different precautions based on the level of the sun’s ultraviolet radiation.

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