Description thePixa KNX contrast sensor detects how many people are in the room and where they are. It works in compliance with data protection regulations and provides important information to the KNX building control. Completely new added values arise for building operators: product presentations can be optimised and valuable information for efficient desk-sharing management is provided for offices. Operating and energy costs for buildings can be reduced. The visualisation of thePixa app shows movements in the heat map in order to optimise the utilisation of rooms and their cleaning. The often high assembly costs after the restructuring of rooms are completely eliminated, as the zones within the detection area can simply be recreated in the app. Jury statement The new contrast sensor thePixa KNX recognises the number and position of people in a room, which opens up many different and interesting use concepts. The compact devices are easy and affordable to install and can be conveniently controlled via an app. Moreover, the special app offers interesting functions for easy start-up and optimal use of the sensor. The design of the sensors is also a clear success. Their clear, stripped-down aesthetics means they fit into many modern environments and architectural styles harmoniously. The innovative system is even more relevant due to the fact that information on occupancy density, especially in the pandemic era, results in more safety.