Abstract: A method for determining the velocity of a moving fluid surface, which comprises the following steps S1 to S5: S1) taking a sequence of images of the moving fluid surface by at least one camera; S2) comparing a first image from the sequence with a second image from the sequence in order to distinguish moving patterns of the fluid surface from non-moving parts and to obtain a first processed image (im_1f) comprising the moving patterns; S3) comparing a third image from the sequence with a fourth image from the sequence in order to distinguish moving patterns of the fluid surface from non-moving parts and to obtain a second processed image (im_2f) comprising the moving patterns; S4) comparing the first and second processed images in order to determine the spatial displacements of the moving patterns; and S5) determining from the spatial displacements the velocity.

Abstract: A method for determining the velocity of a moving fluid surface, which comprises the following steps S1 to S5: S1) taking a sequence of images of the moving fluid surface by at least one camera; S2) comparing a first image from the sequence with a second image from the sequence in order to distinguish moving patterns of the fluid surface from non-moving parts and to obtain a first processed image (im_1f) comprising the moving patterns; S3) comparing a third image from the sequence with a fourth image from the sequence in order to distinguish moving patterns of the fluid surface from non-moving parts and to obtain a second processed image (im_2f) comprising the moving patterns; S4) comparing the first and second processed images in order to determine the spatial displacements of the moving patterns; and S5) determining from the spatial displacements the velocity.

Abstract: A device (1) for mixing a sample, in particular for an automatic chemical analysis instrument, comprises a receptacle device with at least two moveably guided container receptacles (21-24, 31.1), with each container receptacle (21-24, 31.1) comprising a support region for holding a sample container (41-44). The support regions of the two container receptacles (21-24, 31.1) are arranged at different heights in an operational state of the device (1).

Abstract: A device (1) for mixing a sample, in particular for an automatic chemical analysis instrument, comprises a receptacle device with at least two moveably guided container receptacles (21-24, 31.1), with each container receptacle (21-24, 31.1) comprising a support region for holding a sample container (41-44). The support regions of the two container receptacles (21-24, 31.1) are arranged at different heights in an operational state of the device (1).