While activity trackers monitor your steps, this innovative sensor, developed by Dr. Mubarak Mujawar and Yogeswaran Umasankar, aims to measure blood alcohol levels. Worn like a watch, the sensor detects vapors from the skin and sends the data to a server. The sensor is connected to an app that will notify a users loved ones when the alcohol readings are high.  This easy-to-wear gadget will help address issues with social drinking and addiction.