Abstract: A single-channel lower part for a pipette includes a housing lower part defining an interior space with an opening and a housing floor, an attachment for mounting a pipette tip, a through-channel extending from the lower end of the attachment into the interior space, and a spring space. The spring space includes a radially inwardly protruding limit with a through-opening. A plunger actuator is at least partially positioned in the spring space and configured to displace a plunger in a cylinder and align with the through-opening. A spring support is connected to the plunger actuator above the limit and protrudes radially outward from the plunger actuator. A helical spring is positioned in the spring space and supported by the limit and the plunger actuator extends through the helical spring. A first guide is structured to guide the plunger actuator in the axial direction of the housing lower part.

Abstract: A centrifuge (10) includes a flammable temperature-control medium. The centrifuge has a very simple design and nevertheless offers sufficient protection against ignition of the flammable temperature-control medium in the event of a crash, but also at standstill and during the course of operation. To this end, a first section (42) of the temperature-control media line (40), which is arranged in the area of potential electrical or electronic ignition sources for the flammable temperature-control medium, has no connection points (114).

Abstract: The invention relates to a thermoblock for receiving and regulating the temperature of at least one laboratory specimen vessel in a laboratory temperature regulation device, more particularly in a PCR thermocycler, wherein the thermoblock has been produced by means of an additive manufacturing method using a material containing metal. The invention further relates to a method for producing the thermoblock and a computer-implemented method for the simulation of physical characteristics of the thermoblock to be produced in accordance with the invention.

Abstract: The invention relates to a plunger rod (10) for a liquid transfer device (100), the plunger rod (10) being of two- or multipart construction. The plunger rod (10) has a first plunger rod component (12), in operative connection with an actuating device (110) of the liquid transfer device (100), and a second plunger rod component (14). The plunger rod (10) comprises a sealing seat (16) for receiving a sealing element (18) for the plunger rod (10), wherein a parting line (20) between the first plunger rod component (12) and the second plunger rod component (14) is configured so the sealing seat (16) is free of parting line flash (22). The invention includes a method for producing a plunger rod (10) and a liquid transfer device (100), in particular a pipette (102, 104, 106) and/or a multichannel bottom part (108) for a pipette (102, 104), with such a plunger rod (10).

Abstract: The invention relates to a pipette with a body for receiving a displacement device, the displacement device comprising a displacement chamber and a movable boundary element for bounding a pipetting stroke of the pipette. The pipette furthermore has an operating element for setting the pipetting volume of the pipette by movement of the boundary element in the body and for performing a pipetting operation, the operating element being in operative connection with a piston movable in the displacement chamber of the displacement device. The pipette furthermore comprises a counter for displaying the set pipetting volume and a locking mechanism for locking and/or unlocking volume setting by the operating element. It is provided that, on actuation of the operating element, the operating element is configured to perform a pipetting operation, to transfer the locking mechanism into a locked position and to lock adjustment of the pipetting volume.

Abstract: A method of operating an item of laboratory equipment cooled using a flammable refrigerant. The method includes ventilating an interior of the cooled laboratory equipment with the aid of a fan, wherein control of the fan is carried out over a first time period by a first control device; checking, with the aid of a first predefined criterion, whether the ventilation was successful; transferring control of the fan to a second control device if ventilation was successful over the first time period; checking, with the aid of a second predefined criterion, whether the fan is being successfully controlled by the second control device; activating a power supply for at least one further device, which is to be electrically powered, of the cooled laboratory equipment if the fan is being successfully controlled by the second control device. A corresponding item of laboratory equipment is also disclosed.

Abstract: The invention relates to a laboratory tempering device for storing laboratory samples at a target temperature. It relates in particular to an incubator (1) for growing cell cultures. The invention moreover relates to a method for setting a target temperature in a laboratory tempering device that is based in particular on estimating the temperature inside the chamber.

Abstract: An air cushion pipette comprises at least one seat configured to releasably hold a pipette tip and a displacement apparatus comprising a displacement chamber including a displacement element configured to be displaced therein. A drive apparatus is coupled to the displacement element and configured to displace the displacement element in the displacement chamber. An overstroke apparatus comprises a lower stop and is configured such that a stop element displaces the lower stop downwards when the stop element presses against the lower stop, wherein the downward displacement of the lower stop is limited to a first overstroke. A displaceable overstroke limiting element is configured to enable the displacement of the lower stop downwards by the first overstroke in a release position and limit said displacement to a second overstroke that is shorter than the first overstroke in a blocking position.

Abstract: The invention relates to a laboratory instrument, a system and a method for the instrument-controlled treatment of at least one laboratory sample using at least one consumable, by means of which information is obtained automatically as first data during a treatment, wherein the system and/or the laboratory instrument comprises a communication apparatus for establishing a data connection to at least one data processing apparatus, wherein the communication apparatus is suitable for transmitting these at least some first data to the data processing apparatus.

Abstract: The invention relates to a live cell culture incubator, a method of working with an incubator, and a system comprising an incubator in which an object tracking system is implemented.

Abstract: Method for calibrating an optical recording device, the method comprises constructing a plurality of scenes so that, for each location of the first set of calibration locations, a calibration indicium of the set of indicia is located in a respective scene of the plurality of scenes at said each location; acquiring a plurality of images, so that each scene of the plurality of scenes is displayed in a respective image of the plurality of images; locating a plurality of calibration loci so that, for each location of the first set of calibration locations, a respective locus of the plurality of calibration loci is comprised in a respective image of the plurality of images; and calibrating the optical recording device by using the loci of the plurality of calibration loci as locations in the image plane of the projection onto the image plane of the first calibration view.

Abstract: A method for marking objects made of plastic for laboratory use includes producing a contrast surface on the plastic of the object using at least one laser beam and producing a writing in the contrast surface using at least one laser beam. When the contrast surface is light-colored, the writing is dark-colored, and when the contrast surface is dark-colored, the writing is light-colored.