Abstract: An electric motor 1 consisting of a stator 4 comprising a housing 3, a rotor 5 which comprises a shaft 6 mounted in such a manner that it can rotate in the stator 4, and a sealing element 2 which seals a rotor space 7 enclosed by a housing 3 from an additional space 8 contaminated with harmful materials. The sealing element 2 consists of an elastic sealing plate 9 of at least approximately constant thickness, said elastic sealing plate comprising a central recess 10 which receives a section of the shaft 6 and an annular surface area 11 in contact with the housing 3, and an arrester plate 12 which is pressed firmly onto the shaft 6 and causes the contact of the sealing plate 9 with the housing 3, and that the distance between one side of the arrester plate 12, specifically the front side facing the housing 3, and the housing area 15 in contact with the sealing plate 9 is less than the thickness of the sealing plate 9.

Abstract: A device (1) and/or a method for measuring the lifetime of the fluorescence of fluorophores in samples are disclosed, the device used (1) including at least one light source (2) for exciting the fluorescence of the fluorophores, an irradiation optic (3) for directing the excitation light (4) onto these samples, a sample table (5) for placing a microplate (6), which contains a sample, at the irradiation optic (3), an emission optic (7) for directing the fluorescence light (8) from the samples onto a detector (9), and at least one detector (9) having analysis electronics.