Abstract: A pipette device has a coupling stud on which a pipette tip can be stuck in a slipping-on direction for coupling. The coupling stud has an adjustable prestress member that can be adjusted into a prestress state and a release state via an actuation device which is provided in the coupling stud. The pipette tip has an axial stop which interacts with a counter-stop of the coupling stud in an axial coupling position of the pipette tip. The prestress member in its prestress state acts upon a working surface of the stuck-on pipette tip having a surface component of the pipette tip, which extends radially inward, turned away from the stuck on direction, in such a way that it abuts sealingly on the working surface, and prestresses the pipette tip on the pipette unit into the axial coupling position. The prestress member, in its releasing state, substantially releases the working surface of the pipette tip (101).

Abstract: A sample container comprises a first container and a second container enclosing the first container, the containers capable of being brought into a storage position to form a collecting chamber therebetween having a first, smaller volume, and into an analysis position, in which the collecting chamber has a second, larger volume, wherein a fixing means is provided on the first container, which can be brought into fixing engagement with a mating fixing means provided on the second container such that relative motion of the containers is made more difficult in at least one relative motion direction and/or wherein a locking means is provided on the first container, which locking means can be brought into locking engagement with a mating locking means provided on the second container such that relative motion of the two containers is made more difficult in at least one relative motion direction.

Abstract: For aspiration and dispensation of a metering fluid, a pipetting apparatus comprises a work fluid which differs from the former, the work fluid being accommodated in a work space with a variable volume which extends along a channel axis and, with reference to the latter, is formed by a piston-cylinder system at least along an axial section of the channel axis, having a cylinder which delimits the work space along a cylinder section in the radial direction and a piston which delimits the work space in a first axial direction, the cylinder and the piston being arranged so that they can move with respect to each other such that the piston-cylinder system has an axial longitudinal end region for metering, which is open for aspiration and dispensation, and an axial longitudinal end region for work which is closed by the piston, the piston being designed as an outer piston and surrounding the cylinder on the outside in the longitudinal end region for work of the piston-cylinder system.

Abstract: For aspiration and dispensation of a metering fluid, a pipetting apparatus comprises a work fluid which differs from the former, the work fluid being accommodated in a work space with a variable volume which extends along a channel axis and, with reference to the latter, is formed by a piston-cylinder system at least along an axial section of the channel axis, having a cylinder which delimits the work space along a cylinder section in the radial direction and a piston which delimits the work space in a first axial direction, the cylinder and the piston being arranged so that they can move with respect to each other such that the piston-cylinder system has an axial longitudinal end region for metering, which is open for aspiration and dispensation, and an axial longitudinal end region for work which is closed by the piston, the piston being designed as an outer piston and surrounding the cylinder on the outside in the longitudinal end region for work of the piston-cylinder system.

Abstract: A pipette device has a coupling stud on which a pipette tip can be stuck in a slipping-on direction for coupling. The coupling stud has an adjustable pre-stress member that can be adjusted into a prestress state and a release state via an actuation device which is provided in the coupling stud. The pipette tip has an axial stop which interacts with a counter-stop of the coupling stud in an axial coupling position of the pipette tip. The prestress member in its pre-stress state acts upon a working surface of the stuck-on pipette tip having a surface component of the pipette tip, which extends radially inward, turned away from the stuck on direction, in such a way that it abuts sealingly on the working surface, and prestresses the pipette tip on the pipette unit into the axial coupling position. The prestress member, in its releasing state, substantially releases the working surface of the pipette tip (101).

Abstract: A pipette device has a coupling stud on which a pipette tip can be stuck in a slipping-on direction for coupling. The coupling stud has an adjustable pre-stress member that can be adjusted into a prestress state and a release state via an actuation device which is provided in the coupling stud. The pipette tip has an axial stop which interacts with a counter-stop of the coupling stud in an axial coupling position of the pipette tip. The prestress member in its prestress state acts upon a working surface of the stuck-on pipette tip having a surface component of the pipette tip, which extends radially inward, turned away from the stuck on direction, in such a way that it abuts sealingly on the working surface, and prestresses the pipette tip on the pipette unit into the axial coupling position. The prestress member, in its releasing state, substantially releases the working surface of the pipette tip (101).

Abstract: The unit has three rotors, namely a reagent rotor (1), a sample rotor (2) and a reaction rotor (3). Each rotor has seats for vessels, which are arranged in circles about the respective rotor axis. At least two of the rotors (1, 2) are arranged concentrically to one another. The rotors can be brought into a plurality of rotating positions in which at least one of the openings (5b, 7b, 8b) is located in a predetermined liquid handling position (LH position).A liquid handling unit (LH unit) comprises a liquid transfer needle (18) which is movable by a transfer needle moving apparatus in such a way that the movement path (23) crosses at least one LH position of each circle of openings (5b, 7b, 8b) on each rotor (1, 2, 3).It thus become possible with a simply designed layout to carry out a wide range of heterogeneous immunological analyses in a flexible manner.