Inspectors of the Department of Supervision and Preventive Work in the Zelenodolsk Municipal District, together with employees of the 8th fire and rescue squad, conduct preventive raids on the residential sector of Zelenodolsk. They do not just communicate with local residents, hand them memos, remind them of the rules of safety in everyday life. The main emphasis is the propaganda of the installation of autonomous fire detectors in houses. The inspectors tell the residents of Zelenodolets about these devices, the principle of their operation, convince them of the need to equip the dwellings with fire detectors. Such sensors are able not only to detect a fire that has begun in time, but most importantly, they can save people's lives!