Abstract: An optical analyzer measures light directed from a sample to the detector. The apparatus has an optics module which has a detector and optics for directing light emitted by the sample to the detector and which module can be positioned alternatively either so that the light is directed to the detector from above the sample or so that light is directed to the detector from below the sample. The invention is usable in particular in fluorometers and in luminometers.

Abstract: A holder for sample-holding plates has a retainer for pressing a plate placed in the holder both against the back wall and against a side wall. Thus a plate of a certain type will always settle in the same position in the holder. It is also possible to use in the holder plates of many sizes, which can be kept in place during handling owing to the retainer. The device is suitable for use in particular in assay methods in which samples to be assayed are handled on plates having a plurality of wells, for example in optical analyzers or other apparatuses.

Abstract: Dosage equipment, which includes a peristaltic pump for the dosage of liquid. The set of hoses (17) of the peristaltic pump includes an upper piece (18) and a lower piece (19). The body of the pump includes an attaching piece (13), to which the upper piece and the lower piece can be attached.