Desk occupancy sensor is a small device that can be installed under a desk to detect weather the desk is occupied or not. This sensor also has a built-in temperature sensor to report temperature in that area. WiFi desk occupancy sensors, are connected IoT devices that use PIR(Passive Infrared) based detection sensor to identify if a desk is occupied or not.
Humans emit infrared heat radiation. Desk occupancy sensors have a built-in PIR(Passive Infrared sensor) that constantly looks for heat radiation. If the sensor detects such a radiation, the sensors reports the desk as"occupied" otherwise "unoccupied". The sensors can do the reporting wirelessly over an ambient Wi-Fi network.