Abstract: A control arrangement and method for controlling a sensor-free diaphragm pump are disclosed. The control arrangement comprises a control-fluid inlet for connection to a first control-fluid reservoir having a pressure level which is elevated in relation to a reference pressure, a control-fluid outlet for connection to a second control-fluid reservoir having a pressure level which is reduced in relation to a reference pressure, a control-fluid connection for connection of a control-fluid line for the sensor-free diaphragm pump, wherein the control-fluid inlet is connected via a first proportional valve to a collecting point, and the control-fluid outlet is connected via a second proportional valve to the collecting point, wherein a mass flow sensor is arranged between the collecting point and the control-fluid connection. A control unit is in signal communication to the first proportional valve, the second proportional valve and the mass flow sensor.

Abstract: A centrifuge, in particular laboratory centrifuge (1; 21), has, in the interior of a centrifuge housing (3), a rotor (7) for receiving and centrifuging centrifuged material. The centrifuge housing (3) has a top side, a bottom side, a front side and a rear side. The centrifuge has an electronic unit (5) with a plurality of electronic components for realizing electronic functions for operation of the centrifuge. The centrifuge is designed in such a way that the electronic unit (5) can be taken out of the centrifuge housing (3) from the front side.

Abstract: The invention relates to a laboratory instrument for working on laboratory samples, and a network instrument insertable inside a working chamber of the laboratory instrument. The laboratory instrument comprises a working chamber for housing the laboratory sam-ples, a network interface apparatus for providing a network connection capable of ex-changing data for the at least one network instrument, when the same is arranged and installed in an installed position inside the working chamber, the network interface appa-ratus comprising a communication apparatus being arranged outside the working cham-ber and providing the network connection, and a connector apparatus including at least one first connector for connecting with the network instrument, the at least one first con-nector being arranged facing the inside of the working chamber and being connected with the communication apparatus for allowing the data exchange.

Abstract: A sterile protection attachment for a tip of a liquid-handling device including a mount for fastening the sterile protection attachment to the liquid-handling device, a protective bell arranged in the mount and having an inner cavity, and a supply line for sterile air connected to the inner cavity, in which the protective bell has an opening at a lower end and has a receiver for the tip at an upper side opposite the lower end and within which the tip can be flushing with sterile air.

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.