A building pressure sensor is a device used to measure the pressure inside a building. It is typically used to monitor air pressure in order to ensure a safe and comfortable environment for occupants. The sensor is usually placed in the ceiling or wall of a room and can detect changes in pressure from both inside and outside the building. It is also used to detect any changes in the air pressure that could be caused by a fire or other emergency situation. The sensor can also be used to detect any changes in the air pressure that could be caused by a blocked air duct or other obstruction. By monitoring the pressure inside a building, it is possible to identify potential problems before they become a major issue. This can help to ensure the safety of the occupants and the integrity of the building.