Abstract: An extractor hood includes a functional unit, a control unit designed to control the functional unit, a hood body, a flap pivotably fastened to the hood body, and a sensor arranged on the flap and designed to detect a state of the flap. The sensor is embodied as an acceleration sensor and connected to the control unit such that the functional unit is controlled by the control unit based on the detected state of the flap.

Abstract: The invention relates to a UV stable transdermal therapeutic system (TTS) consisting of a back layer, at least one matrix containing an active substance and, optionally, a withdrawal film and an UV-radiation absorber. An adhesive layer containing said UV-radiation absorber is arranged between the back layer and the matrix containing an active substance which is distant as much as possible from a surface, a separation layer is arranged between the adhesive layer containing said UV-radiation absorber and the matrix containing an active substance, which is as remote as possible from the surface which is impermeable to the active substance and UV radiation absorber. The inventive transdermal therapeutic system exhibits a high stability and is devoid of inconveniences of existing TTS containing a light-sensitive substance.