A cosmetic container with an adjustable discharge quantity includes a container body, an inner cover, an outer cover, a button, a piston, and an elastic member. The upper part of the container body is provided with an opening. The inner wall of the inner cover is threadedly connected to the opening of the container body, and the inner cover extends upward to form an inner cylinder. A plurality of stepped grooves with different depths are arranged in parallel in a movement area of the outer wall of the inner cylinder. The lower end of the inner cover is hermetically connected to a dropper. The outer cover is fixedly connected to the inner cover. The button is inserted between the inner cover and the outer cover. The piston is sleeved on a piston connecting rod of the button and moves up and down with the button.

A pipettor includes a wash chamber between an upper plate, a lower plate, an upper seal, and a lower seal. The upper and lower seal retain each other and are located between the upper and lower plates. The pipettor includes a gasket located below the lower plate, a pipette tip retained by the gasket, and a piston with a tapered tip that passes through the plates, seals, and gasket into the pipette tip. The upper and lower seal isolate the piston from the wash chamber. The pipettor includes a channel defined by the piston, extending into the pipette tip, and an actuator that advances and retracts the piston. When the actuator retracts the piston such that the piston loses sealing contact with the lower seal and the wash chamber is supplied with wash fluid and pressurized, wash fluid passes through the groove in the upper seal and into the channel.

Described are exemplary embodiments of a syringe identification system for use with a positive displacement pipette, such as a handheld powered positive displacement pipette. An exemplary syringe identification system may include a sensor, such as a color sensor, that is located at or near a distal end of the pipette and arranged such that the sensor is operative to read an identifying marking(s) on a syringe that has been installed to the pipette. The sensor may be a color sensor having an illumination source and configured to read a color code on the syringe. The color code may be usable to identify the syringe to the pipette.

A method for dosing a liquid using a pipette with adjustable dosing step size and an indicating equipment and a syringe that can be operated using the pipette, wherein the syringe is detachably connected to the pipette, at option, the dosing step size is set, or the dosing step size set before is maintained, the dosing volume adjusted via the dosing step size is indicated by means of the indicating equipment, the maximum number of dosing steps possible without refilling the syringe, with the set dosing step size and completely filled syringe is indicated by means of the indicating equipment, liquid is aspirated into the syringe, a reverse stroke is performed after the syringe is filled with liquid, dosing steps are performed, the performed dosing steps are counted and the number of performed dosing steps and/or the number of dosing steps still possible without refilling the syringe is determined and indicated by means of the indicating equipment, after performing the maximum number of dosing steps possible without refilling the syringe, either the syringe is detached from the pipette, or the previous steps are performed anew by means of the same syringe, wherein in the dosing step, the overall performed number of dosing steps with the syringe with the set dosing step size is counted, and/or the number of dosing steps still possible without refilling the syringe is determined and indicated by means of the indicating equipment.

The invention relates to a pipette with a first opening for receiving and removing a liquid to be dispensed and a second opening which lies opposite the first opening. According to the invention, the pipette comprises a material which causes a wavelength shift between the electromagnetic radiation absorbed by the pipette and the electromagnetic radiation emitted by the pipette. The invention additionally relates to a pipette aid for receiving a pipette for dispensing a liquid. According to the invention, the pipette aid comprises both a data storage device, in which a database with reference measurement data is stored, as well as two radiation sources and a radiation detector, wherein the two radiation sources emit electromagnetic radiation with different wavelengths, and the radiation detector detects the wavelength of the received electromagnetic radiation.

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 the syringe is releasably connected to the pipette, the dosing increment is optionally set, or the previously set dosing increment is retained, the dosing volume set by the dosing increment is displayed by means of the display apparatus, liquid is sucked into the syringe by actuating the drawing lever, 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, 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, after the syringe is completely or partially filled with liquid, the reverse stroke is executed by actuating the control button at least once, 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 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 method for detecting the type of an exchangeable piston-cylinder unit for a dispenser, to a piston-cylinder unit having at least one radially oriented information carrier section, and at least one axially oriented information carrier section, both of which at least partially specifies the type of piston-cylinder unit, and to a dispenser having an acquisition device for automatically identifying the type of piston-cylinder unit arranged on the dispenser. The method has at least the following steps: a) detachably mounting the piston-cylinder unit on the dispenser by at least an axial movement; b) detecting completion of a successful mounting of the piston-cylinder unit on the dispenser with a sensor device; c) detecting an information of the axially oriented information carrier section; d) detecting an information of the radially oriented information carrier section; and e) determining the type of the piston-cylinder unit mounted on the dispenser from the detected information.

A dosing device is proposed which is designed for dosed output of a fluid. The dosing device has a block-shaped channel body, through which a dosing channel system passes. The dosing channel system has a fluid infeed opening and a plurality of fluid output openings. The fluid output openings are formed by the channel apertures of narrowed output sections of a plurality of output channels of the dosing channel system. The entire dosing channel system, including the output channels, is formed in the block-shaped channel body. The dosing channel system is preferably structured such that the flow velocity of the fluid channelled through during operation is at least substantially the same throughout with the exception of in the output sections of the output channels.

A pipetting device includes a housing, a valve assembly, and an actuator assembly. The housing includes a tip for receiving a capillary tube. The valve assembly includes a shuttle valve having a filling position and a dispensing position and a valve rod. The actuator assembly includes an actuator, a valve trigger, a piston mount, and an indexing mechanism. The actuator extends from the housing and has a push button coupled to a push rod. The valve trigger being configured to engage the valve assembly and includes an aperture configured to receive the piston mount therein. The indexing mechanism is configured to index a rotated position of the push button to a predefined volume of dispensed fluid.

A dispenser for receiving and dispensing volumes of fluid, on which a piston/cylinder unit having a piston and a cylinder, can be fitted in a releasable manner by means of a movement running at least substantially in an axial direction of the dispenser. The dispenser has a piston actuator for moving the piston relative to the cylinder. The piston actuator is arranged in a movable manner in the dispenser and is driven by means of a drive. The dispenser has a locking element which is arranged in a movable manner in the dispenser and is driven by a further drive. Also disclosed is a system for receiving and dispensing volumes of fluid, to a method for fitting a piston/cylinder unit in a releasable manner on a dispenser, and to a method for releasing a piston/cylinder unit which has been fitted on a dispenser.