The data on the number of people inside the venue is captured by a PassCounter4D installed overhead at the entrance. With its accuracy above 99% and AI algorithms, occupancy control is robust and precise. Temperature, humidity, and CO₂ levels are collected and transmitted via Wi-Fi by a small sensor located inside the venue. The OnTrace platform receives all the recorded information and processes it in real time to display it on a monitor, so visitors can immediately see upon entry that the space meets optimal health conditions.