Abstract: In the case of a plate-shaped substrate material (20), in which a microfluidic structure (5) is formed, there is consequently the ability for light (11, 12) that was diffusely scattered by an inner wall (9) to be captured and that a fill level, a speed of advance or any other variable for characterizing a liquid transport of a liquid (8) in the microfluidic structure (5) be ascertained by calculation from the captured, diffusely scattered light (11, 12).

Abstract: In a cytometer unit (1) with a receptacle (2) into which a rotatable and preferably disk-shaped sample carrier (3) is insertable, it is proposed to define a first fixing means (14) for the definition of a position of a cytometer channel (12) of the inserted sample carrier (3) transversely with respect to the direction of extent thereof and transversely with respect to an optical path (11), by which a cytometric measurement can be carried out, and to use a second fixing means (19) to define a position of the cytometer channel (12) of the inserted sample carrier (3) along the optical path (11).

Abstract: In the case of a cytometer unit (1) comprising a receptacle (2), which is configured for the insertion of an exchangeable sample carrier (3) and in which an optical path (4) for carrying out a cytometric measurement is implemented, it is proposed to bleach the sample carrier (3) in a region (10) around a sensitive region (18) predefined by a detector arrangement (8) and/or to alter a position of the optical path (4) on the inserted sample carrier (3) using an alteration means (16).

Abstract: In the case of a plate-shaped substrate material (20), in which a microfluidic structure (5) is formed, there is consequently the ability for light (11, 12) that was diffusely scattered by an inner wall (9) to be captured and that a fill level, a speed of advance or any other variable for characterizing a liquid transport of a liquid (8) in the microfluidic structure (5) be ascertained by calculation from the captured, diffusely scattered light (11, 12).

Abstract: In a cytometer unit (1) with a receptacle (2) into which a rotatable and preferably disk-shaped sample carrier (3) is insertable, it is proposed to define a first fixing means (14) for the definition of a position of a cytometer channel (12) of the inserted sample carrier (3) transversely with respect to the direction of extent thereof and transversely with respect to an optical path (11), by which a cytometric measurement can be carried out, and to use a second fixing means (19) to define a position of the cytometer channel (12) of the inserted sample carrier (3) along the optical path (11).