The indoor air quality control sensor allows real-time measurement of temperature, humidity, CO2 (carbon dioxide, NDIR sensor) and brightness. It allows you to monitor the level of indoor air pollution, and prevent symptoms related to polluted air. It also participates in the fight against the spread of respiratory viruses, such as covid19, by indicating whether the ventilation of the premises is sufficient. Its color LCD screen allows you to view, on site, the last measured values, as well as the recent history. The sensor generates an audible alarm if the defined CO2 pollution threshold is exceeded. The CO2 sensor also sends, every 5 minutes, the data collected to a central and secure server, and allows access to the information from your smartphone or tablet, via a dedicated mobile application (iOS, Android). This application allows to visualize the last data of temperature, humidity, CO2, luminosity, as well as the history of this data on interactive graphs. It is possible to view the data of several sensors, on the same mobile application. This therefore makes it possible to manage a set of places and establishments in a centralized manner.