Abstract: A device including a tube for winding and unwinding a screen which is controlled in rotation by a gear motor and which is supported on a fixed head and wherein a rotational part mounted within the tube is kinematically linked to rotate with the tube with the part including elements that are used to reflect a position of the rotational part and which elements are detected by senors that are connected to an electronic processing unit. A tightly sealed partition secured to the head is further provided to define, on one side, a first compartment for receiving at least the rotational part and, on the other side, a second compartment for receiving at least the electronic processing unit.

Abstract: This device comprises a tube for winding and unwinding the screen, controlled in rotation by a gear motor and supported by a fixed head, a part representative of the position and/or the displacement of the tube, kinematically linked to this tube and means for detecting the representative part, connected to an electronic processing unit. A tight partition fast with the head is further provided to define, on one side, a first compartment for receiving at least the representative part and, on the other side, a second compartment for receiving at least the electronic processing unit.