A team of researchers from the University of Tokyo have developed a solar-powered arm band that can be used to track spikes in body temperature. The device is plastic, and can be worn comfortably both inside and out of clothing. The device allows you to program a temperature threshold, and when the body temperature exceeds the threshold, an alarm will go off. While still in a prototype stage, the device, which is both lightweight and flexible, can have potential uses in hospitals where continuous monitoring of vital signs is ideal. Additionally, its developers believe that the device, currently known as the Fever Alarm Armband, could potentially be programmed to track other vital signs continuously, such as heart rate.
(Source: Popular Science)