Abstract: A cuvette set for blood analysis, comprising a carrier and guide band (2) for fixing the bottom parts of cuvettes (1) so as to build a row of cuvettes parallel to the band, said carrier and guide band (2) being provided with fastening means, such as holes (5) for a control device which carries the row of cuvettes through an analyzer. In order to produce a dimensionally accurate structure, said carrier and guide band (2) is made of a metal and it is provided with fastening means, such as holes (4) for engaging parts (3) protruding from the bottom of plastic cuvettes (1).

Abstract: There is illustrated in the drawings a discharge tube mounting a nozzle which is releasably closed at its outer, terminal end by a plug. A spaced distance above the base of the nozzle there is mounted a flange ring arranged to extend around the nozzle circumference, the flange ring being cut at one point. A rotatable and removable closing cap is fitted over the nozzle and includes at its lower rim an inwardly projecting nib configured to be captured between the flange ring and the upper rim of the tube to secure the cap to the tube, and to pass through the cut portion of the flange ring when aligned with it, to allow removal of the cap. The lower rim of the closing cap or the upper rim of the discharge tube mounts a separate background ring, preferably of a different color than the closing cap and discharge tube, and the ring is disposed behind a downwardly extending arrow-shaped indicator on the cap and behind an upwardly extending arrow-shaped indicator on the upper rim of the discharge tube.