What is PPG

Microelectronics is shrinking health equipment in size, cost and operability, thereby moving it from the medical to the consumer market. A typical example is the oximeter. Originally, it was the bulky helper of the anesthetist in the operating theatre, but gradually it has become a routine check for hospital admittance and is rapidly shaped as a simple consumer item, similar to a smart thermometer. The success is inspiring for more. A variety of sensor types are being experimented with to capture the vital data for health in general, and fitness in particular. Accessories are placed in, on and around the body and together with the smartphone they are rapidly becoming part of a ‘fashion statement'. Some sensors are integrated into a single product; some are wireless connected to one or more wearables to provide extensive services.