Scanadu isn't quite a Tricorder yet

There's a lot coming in personal sensors and healthcare in 2014 and the years to follow. This is one to watch. 

The object Scanadu is working on is an oval disk about two inches wide and a half-inch thick. Held to the forehead, it uses light to measure oxygen intake, an accelerometer to figure out how far the chest extends in breathing, and a small electrical plate under the thumb to measure heart rate. Other sensors, some still in development, will measure temperature, blood pressure and other body functions.