The Density sensor is a tiny sensor device that is designed to collect foot traffic data in order to give you an idea of how crowded a particular place is. If you want to know if there's a long lineup outside your favorite brunch spot or if the weight room in the gym is going to be rammed, this sensor will help you. It is designed to be attached to the entrance of premises so that it can capture people's comings and goings, providing real-time data to people who are interested in knowing how crowded said place is.
Once a public place -- whether a business, museum or university -- has signed on to use the Density sensor, it can go ahead and create an app using the location data in a manner that best suits their customers' needs.
The end result is that the Density sensor can actually enable businesses to drive more traffic in their direction at no additional cost to the consumer.