Fraction collector dispensers and methods of using such dispensers are provided. In one embodiment, the dispenser includes an inlet for receiving liquid from a liquid source, wherein the inlet is in fluid communication with an outlet from which liquid is dispensed into a receptacle; and a reservoir in fluid communication with a flow path between the inlet and outlet, wherein the reservoir comprises trapped air therein and is configured to receive liquid during movement of the dispenser between receptacles or during movement of receptacles between dispense positions, wherein the dispenser is moveable between a first receptacle and a second receptacle or the receptacles are moveable between dispense positions.

A liquid contact step including injection of liquid into a flow path using a pipette chip and suction of liquid from the flow channel is performed multiple times, and a predetermined reaction is thereby performed inside the flow channel. In at least one liquid contact step, a first suction is performed in which liquid is suctioned in a state in which the pipette chip and the bottom of a liquid injection section are in contact or in close to each other. Meanwhile, in at least one liquid contact step, a second suction is performed in which the liquid is suctioned in a state in which the pipette chip and the bottom of the liquid injection section are more separated than in the first suction.

One or more techniques and/or systems are disclosed for use with a syringe or pipette that may provide improved dispensing of fluids from the syringe or pipette. For example, typical syringes or pipettes can draw in a desired volume of fluid, and subsequently dispense the same volume. As described herein, a device can be configured to draw in a first volume and subsequently dispense the first volume and a second volume of fluid, such that portions of the fluid, such as liquids, that may be retained in the syringe or pipette can be displaces by the second volume.

A method for dosing liquid by means of a pipette with an adjustable dosing increment, a display apparatus, a drawing lever to draw liquid into a syringe, and a control button to discharge liquid in steps from the syringe, and the syringe actuated by means of the pipette, wherein: 1.1. the syringe is releasably connected to the pipette, 1.2. the dosing increment is optionally set, or the previously set dosing increment is retained, 1.3. the dosing volume set by the dosing increment is displayed by means of the display apparatus, 1.4. liquid is sucked into the syringe by actuating the drawing lever, 1.5. the respective position of a drive element of a drive mechanism of the pipette for filling and draining the syringe when the drive element is shifted along a path is detected, 1.6. the possible maximum number of dosing steps with the set dosing increment without refilling the syringe after executing the reverse stroke starting from the position of the drive element reached at the end of filling is determined and displayed by means of the display apparatus, 1.7. after the syringe is completely or partially filled with liquid, the reverse stroke is executed by actuating the control button at least once, 1.8. dosing steps are executed by actuating the dosing button, the executed dosing steps are counted, the number of executed dosing steps and/or the number of still possible dosing steps without refilling the syringe are determined and displayed by means of the display apparatus, and 1.9. after executing the maximum possible number of dosing steps without refilling the syringe, either the syringe is removed from the pipette, or steps 1.2 to 1.8 are repeated with same syringe, wherein in step 1.8, the total number of dosing steps performed with the syringe with the set dosing increments is counted, and/or the number of still possible dosing steps without refilling the syringe is determined and displayed by means of the display apparatus.

A dosing pipette for discharging a medium, wherein the pipette has a housing and a dosing piston. The housing has a dosing geometry which can be decoupled from the housing.

A pipette for actuating a syringe including a strip-shaped housing with first and second receptacles for inserting fastening sections. First and second releasable holding mechanism for holding the fastening sections. First and second displacing mechanisms to displace a receiving body in the housing from the receptacles. A toothed rack and a pawl are connected to an actuation rack. A cover has a coupling element and longitudinal slot and spring.

The invention relates to a fluid transfer apparatus, in particular pipetting apparatus, for transferring at least one fluid laboratory sample, in particular a biochemical or medical laboratory sample, comprising a base body, which has a connecting section serving for connecting a container to the base body for the intake of the at least one fluid sample into the container, a movement device, which can bring about the intake and/or delivery of at least one fluid laboratory sample into the container, an electrical control device, which controls at least one function of the fluid transfer apparatus, a sensor device, which comprises at least one acceleration sensor which is signal-connected to the control device and by means of which at least one acceleration value can be measured during the movement of the fluid transfer apparatus, wherein the control device is designed such that it uses the at least one acceleration value during the control of the at least one function. The invention furthermore relates to a method for using at least one acceleration value in a fluid transfer apparatus.

Pipette for operating a syringe with a bar-shaped housing, a fixture with an opening at the lower end of the housing for putting in a syringe with a fastening portion on the upper edge of a cylinder, a fixture body with a further fixture and a further opening on the lower end of the housing, for putting in a further fastening portion of a piston of the syringe, means for detachably holding the fastening portion in the fixture and the further fastening portion in the further fixture, means for displacing the fixture body within the housing in the longitudinal direction of the housing, which have a draw-up lever activated from the outside of the housing, which is connected to the fixture body via a connection element which grips through a straight slit extending in the longitudinal direction of the housing, wherein below the slit in the housing, a cover stripe covering the slit is held in the housing at two positions spaced apart from each other in the longitudinal direction of the slit, and wherein the connection element has a channel through which the cover stripe extends.

A driving device and a liquid injection device including the same are disclosed. A driving device according to an aspect may include a frame; a rotation shaft rotatably supported by the frame; a rotation driving unit configured to rotate the rotation shaft; a plurality of pinions configured to be spaced apart in the longitudinal direction of the rotation shaft and respectively coupled to the rotation shaft; and a plurality of racks configured to be engaged with the plurality of pinions, respectively and configured to move forward in a direction perpendicular to the longitudinal direction of the rotation shaft, wherein when the rotation shaft rotates, the engagement of the plurality of pinions and the plurality of racks that respectively correspond to each other is sequentially performed.

A multichannel pipetting head comprises a plunger actuator comprising at least one groove with an upper border, and a lower border. A plurality of plunger-cylinder units, wherein each plunger-cylinder unit comprises a cylinder and a plunger comprising a plunger head. The plunger head comprises a projecting upper abutment region adjoining the upper border, a projecting lower abutment region adjoining the lower border and laterally offset relative to the projecting upper abutment region, a plurality of guides. Each of the cylinders is coupled to a neck and held on each of the plurality of guides. During lateral movement of the plurality of guides, the plunger head is configured to tilt in the groove and to be held with the upper abutment region abutting the upper border and with the lower abutment region abutting the lower border of the groove due to restoring forces that occur during tilting in the plunger-cylinder units.