Abstract: A photometer with controllable heating plates both above and below the set of sample cuvettes. The photometer is in particular used so that the upper plate is regulated to be warmer.

Abstract: Method for the precise dilution of a liquid sample, in which diluting agent is pumped through a main channel (1) open at its lower tip and, at the same time, sample is pumped through a side channel (2), whose lower tip (11) opens into the main channel. The invention can be used e.g. in photometers.

Abstract: Method and apparatus for the measurement of properties of a liquid present in a vessel (2), for example for the measurement of the absorbance of a liquid, of the properties of an agglutination, precipitate (4) or any other reaction result placed on the bottom of a vessel, by means of radiation and of a detector (3) receiving radiation while the vessel moves along with a rotor revolving around the vertical axis (15) of a centrifuge. Thereby the beam of measurement (5) coming from the source of radiation (1) passes substantially horizontally and the intensity of the radiation passing through, or reflected from, the contents of the vessel is measured.

Abstract: A code system for the identification of a sample group to be measured in a multi-channel photometer or in any other multi-channel analysis equipment, e.g. in a spectrophotometer, fluorometer, luminometer, turbidometer, nefelometer, cell counter, or isotope counter. The samples to be measured have been fitted in the matrix form into cuvette sets, sets of test tubes, or pit plates, and the measurement takes place preferably in the vertical direction. The sample group to be measured is provided with a related code piece, such as a code plate, containing the measurement points to be ready by means of the analysis equipment. According to the invention, the measurement points of the code piece are in the same order and with the same relative distances as compared with the measurement channels of the said multi-channel photometer or any other multi-channel analysis equipment, or with a part of or a multiple of said channels.

Abstract: The subject of the present invention is a transfer device for analysis equipment, which transfer device comprises a track consisting of, inter alia, guide and support rails on which to transfer a pit plate on a transport cassette along the track. The transport cassette includes a traction rail parallel to the guide and support rails. Traction units are fitted onto the track in the transfer device as means operative jointly with said traction rail to move the transport cassette. In order to control the operation of the traction units, the traction rail is provided with sign codes readable by means of an optical reading device. This indicates the position of the cassette relative to the optical reading device so that the transport cassette may be stopped to position the desired line of pits, transverse to the track for operations to be performed in the analysis equipment, such as liquid dosage, photometric measurement operations, etc.

Abstract: The subject of the present invention is an apparatus for precise mutual dilution and dosage of liquids, which apparatus comprises a dilution and dosage unit consisting of two cylinder spaces of different volumes and cross-sectional areas, as compared with each other, and connected to a common intake and exhaust tip, as well as of pistons arranged into said cylinder spaces. According to the invention, in each dilution and dosage unit, the lower part of the smaller cylinder space forms the intake and exhaust tip and the piston in the smaller cylinder space consists of a tubular component whose upper part is opened into the lower part of the larger cylinder space of the dilution and dosage unit concerned.