The 4SAFE is an active fault-tolerant infrared sensor that works via distance measurement. The sensor is attached to the leaf of the revolving or revolving door and ensures that users do not come into contact with the revolving door. Thanks to the three-dimensional detection field it ensures a good protection of persons with reduced mobility. Sensor for revolving doors with external monitoring - High protection level for persons thanks to a detection zone of 40 cm* in front of the door consisting of 4 groups of 2 active infrared spots. - Easy to install with the cascade process for up to 6 modules adapted to the width of the door. - Easier wiring on revolving doors thanks to 2 outputs per module. - Adaptation to any type of background (stainless steel plate, grid, water, snow...). - Logistic simplification: each module automatically recognizes and selects its status in the cascade.