The latest wearable product of Apple, the Apple Watch Series 6, features a new function that can monitor users’ blood oxygen saturation, which is a critical indicator of people’s overall wellness. The function marks a milestone of wearable devices and is likely to drive demands for sensing components including LEDs and photodiodes. (Image: Apple) According to TrendForce, most wearable devices measure biometric data, such as heart rate, blood oxygen, blood pressure, and blood sugar levels, as well as sweat content, through a type of optical technology known as ...