Pipetting device

Abstract

The utility model provides a pipetting device, comprising: a fixed base having a mounting surface; the fixing piece is fixed on the mounting surface; each injector comprises a barrel and a piston, one end of each piston is located in the corresponding barrel and arranged in a sliding mode along the axis of the corresponding barrel, the outer side wall of each barrel is fixed to the corresponding fixing piece, and the axes of the barrels of the at least two injectors are parallel to each other; the connecting piece is fixed at the other ends of the pistons of the at least two injectors; one end of the pull rod is fixed on the connecting piece; and the limiting piece is mounted on the mounting surface, and the limiting piece can move in the axis direction of the barrel so as to limit movement of the connecting piece in the axis direction of the barrel. The pipetting device disclosed by the utility model can simultaneously control a plurality of injectors to perform pipetting operation, so that time and manpower are greatly saved, and the pipetting work efficiency is improved. The mounting position can be adjusted in the axial direction of the barrel through the limiting piece, so that the stroke of the piston is limited, the accurate adjustment of the pipetting amount is realized, and different pipetting requirements are met.

Description

Technical Field

[0001] This application belongs to the field of experimental equipment technology, and more specifically, relates to a pipetting device. Background Technology

[0002] In chemical experiments, it is often necessary to accurately and efficiently transfer samples or reagents into various containers (such as beakers, volumetric flasks, test tubes, etc.). This is especially true when processing batches of samples, where it is required to add the same volume of sample or reagent to each container.

[0003] Traditional pipetting involves using pipettes and bulb syringes. During pipetting, the operator must sequentially perform actions such as aspirating liquid, adjusting the liquid level, and dispensing liquid, a relatively cumbersome process. Especially when transferring large volumes of liquid, multiple presses of the bulb syringe are required to complete the aspiration. Furthermore, if the liquid level is accidentally adjusted below the required mark, pipetting will fail, requiring the entire process to be repeated. In addition, using pipettes and bulb syringes allows only one pipetting operation at a time, which is not only time-consuming and labor-intensive but also significantly reduces the efficiency of pipetting. Utility Model Content

[0004] The purpose of this application is to provide a pipetting device to solve the technical problems of cumbersome operation and low efficiency in the existing pipetting methods.

[0005] To achieve the above objectives, the technical solution adopted in this application is: to provide a pipetting device, comprising:

[0006] Fixed base with mounting surface;

[0007] The fastener is fixed to the mounting surface;

[0008] At least two syringes, each syringe including a barrel and a piston, one end of the piston being located inside the barrel and slidably disposed along the axis of the barrel, the outer side wall of the barrel being fixed to the fixing member, and the axes of the barrels of at least two syringes being parallel to each other;

[0009] A connector is fixed to the other end of the piston of at least two of the syringes;

[0010] A pull rod, one end of which is fixed to the connector;

[0011] A limiting member is installed on the mounting surface. The limiting member is movable along the axial direction of the cylinder to limit the movement of the connecting member along the axial direction of the cylinder.

[0012] Optionally, the limiting component includes a limiting plate and a fastener. The limiting plate is movable along the axial direction of the cylinder, and the fastener is used to fix the limiting plate to the mounting surface.

[0013] Optionally, the fixed base is provided with a strip-shaped hole, the length direction of which is the same as the axial direction of the cylinder;

[0014] The limiting plate includes a base plate, and the base plate is provided with mounting holes that are opposite to the strip-shaped holes;

[0015] The fastener includes a bolt and a nut, the bolt passing through the strip hole and the mounting hole and being connected to the nut.

[0016] Optionally, there are two slotted holes, located on both sides of the length of the pull rod.

[0017] Optionally, the mounting surface is provided with graduations along the length of the strip hole.

[0018] Optionally, the limiting plate further includes a side plate, which forms an L-shaped structure with the bottom plate. The side plate is provided with a guide hole, through which the pull rod passes. The side plate is used to limit the position of the connector.

[0019] Optionally, the fastener is a clamp, which is clamped between the surface of the fastener away from the fixing base and the side of the fixing base opposite to the mounting surface.

[0020] Optionally, a handle is also included, which is fixed to the other end of the lever.

[0021] Optionally, the fixing member consists of at least two sleeves, the number of which is the same as the number of syringes. The axial direction of the sleeves is the same as the axial direction of the cylinder, and the outer side wall of the cylinder is bonded to the inner side wall of the sleeves.

[0022] Optionally, the fixing member is a mounting base, which is provided with at least two receiving slots. The number of receiving slots is the same as the number of syringes. The extending direction of the receiving slots is the same as the axial direction of the cylinder. The outer wall of the cylinder is adhered to the receiving slots.

[0023] The beneficial effects of this application are as follows: The pipetting device of this embodiment can simultaneously control multiple syringes for pipetting operations, which greatly saves time and manpower compared to traditional pipettes and bulb syringes, and improves the efficiency of pipetting work. During the pipetting process, the operator only needs to pull the lever to complete the liquid aspiration and push the lever to complete the liquid dispensing, avoiding the cumbersome operation steps in traditional pipetting methods and reducing the difficulty of operation. In addition, this embodiment can adjust the installation position in the axial direction of the cylinder through the limiting component, thereby limiting the piston stroke and realizing precise adjustment of the pipetting volume to meet different pipetting needs. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of a pipetting device provided in one embodiment of this application;

[0026] Figure 2 This is a schematic diagram of the structure of a fixed base provided in an embodiment of this application;

[0027] Figure 3 This is a schematic diagram of the structure of the limiting plate provided in the embodiments of this application;

[0028] Figure 4 This is a schematic diagram of the structure of a fixed base provided in another embodiment of this application;

[0029] Figure 5 This is a schematic diagram of the structure of a pipetting device provided in another embodiment of this application;

[0030] Figure 6 This is a front view of the mounting base provided in an embodiment of this application.

[0031] The following are the labeling elements in the figure:

[0032] 1-Fixed base, 11-Strip hole, 12-Scale, 13-Mounting surface, 14-Limiting groove, 2-Limiting component, 21-Limiting plate, 211-Base plate, 212-Mounting hole, 213-Side plate, 214-Guide hole, 22-Nut, 23-Bolt, 3-Pull rod, 4-Connector, 5-Injector, 51-Cylinder, 52-Piston, 6-Sleeve, 7-Mounting seat, 71-First surface, 711-Receiving groove, 72-Second surface, 8-Handle. Detailed Implementation

[0033] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0034] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two).

[0035] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0036] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0037] It should be understood that in the embodiments of this application, "electrical connection" can be understood as physical contact and electrical conduction between components; it can also be understood as the form in which different components in the circuit structure are connected through physical lines that can transmit electrical signals, such as copper foil of a printed circuit board (PCB) or wires.

[0038] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0040] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0041] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments in any suitable manner.

[0042] Please see Figure 1 The present application provides a pipetting device according to an embodiment. The pipetting device includes: a fixed base 1 having a mounting surface 13; a fixing member fixed to the mounting surface 13; at least two syringes 5, each syringe 5 including a barrel 51 and a piston 52, one end of the piston 52 being located inside the barrel 51 and slidingly disposed along the axis of the barrel 51, the outer wall of the barrel 51 being fixed to the fixing member, and the axes of the barrels 51 of the at least two syringes 5 being parallel to each other; a connecting member 4 fixed to the other end of the piston 52 of the at least two syringes 5; a pull rod 3, one end of which is fixed to the connecting member 4; and a limiting member 2 mounted on the mounting surface 13, the limiting member 2 being movable along the axis of the barrel 51 to limit the movement of the connecting member 4 along the axis of the barrel 51.

[0043] See Figure 2 The fixed base 1 can be a plate-like structure. The mounting surface 13 is either one of the two surfaces formed by length and width, rather than the surface formed by length and thickness, or width and thickness. The mounting surface 13 can be a plane or a curved surface, for example, a curved surface similar to the sidewall of a cylinder. When the mounting surface 13 is curved, the limiting member 2 and the tie rod 3 are also bent, and the degree of bending is adapted to the curvature of the mounting surface 13.

[0044] The fixed base 1 can be made of metal or plastic. The fixed base 1 is the supporting structure of the entire pipetting device and can improve the stability of the entire pipetting device during operation.

[0045] It is easy to understand that syringe 5 can be set to two or more depending on the needs of the experiment. Figure 1 The syringe 5 shown has three syringes. The three syringes 5 are fixed to the mounting surface 13 by fasteners, so that the syringes 5 remain stable during use. The axes of the syringe bodies 51 of the three syringes 5 are parallel to each other, which ensures that each syringe 5 can transfer liquid simultaneously and uniformly during the liquid transfer process.

[0046] Optionally, the connector 4 can be connected to the other end of the piston 52 by adhesive bonding or screws. The presence of the connector 4 allows multiple pistons 52 to be controlled synchronously.

[0047] Optionally, one end of the pull rod 3 is fixed to the connector 4 by adhesive or screws. The connector 4 can be rod-shaped. The combination of the connector 4 and the pull rod 3 allows the user to control the movement of the connector 4 by moving the pull rod 3, thereby achieving unified control of the piston 52 of the syringe 5. The design of the pull rod 3 makes operation more convenient, allowing the user to easily draw and discharge liquid.

[0048] The limiting member 2 limits the movement of the connecting member 4 along the axis of the cylinder 51, thereby limiting the range of movement of the piston 52 of the syringe 5. This ensures that the piston 52 of the syringe 5 will not exceed the predetermined range of movement during the pipetting process. At the same time, the position of the syringe 5 can be adjusted as needed to meet different pipetting volumes.

[0049] The pipetting device of this embodiment can simultaneously control multiple syringes 5 for pipetting operations, which greatly saves time and manpower and improves the efficiency of pipetting compared to traditional pipettes and bulb syringes. During pipetting, the operator only needs to pull the lever 3 to aspirate the liquid and push the lever 3 to dispense the liquid, avoiding the cumbersome operation steps of traditional pipetting methods and reducing the difficulty of operation. In addition, this embodiment can adjust the installation position of the cylinder 51 along the axial direction through the limiting member 2, thereby limiting the stroke of the piston 52 and realizing precise adjustment of the pipetting volume to meet different pipetting needs.

[0050] As an optional implementation, the limiting member 2 includes a limiting plate 21 and fasteners. The limiting plate 21 can move along the axial direction of the cylinder 51, and the fasteners are used to fix the limiting plate 21 to the mounting surface 13.

[0051] Specifically, a metal plate or a plastic plate can be used as the limiting plate 21. The length of the limiting plate 21 can be the same as the width of the fixed base 1, so that the two sides of the limiting plate 21 along the length direction are flush with the two sides of the fixed base 1 along the width direction, improving the aesthetics.

[0052] In this embodiment, the combination of the limiting plate 21 and the fastener allows the limiting plate 21 to be easily moved and fixed on the mounting surface 13, and the fastener can fix the limiting plate 21 to the mounting surface 13. Thus, through the cooperation of the limiting plate 21 and the fastener, the pipetting volume can be flexibly adjusted according to different pipetting needs, thereby improving the applicability of the pipetting device.

[0053] As an optional implementation, the fixed base 1 is provided with a strip hole 11, the length direction of the strip hole 11 is the same as the axial direction of the cylinder 51; the limiting plate 21 includes a base plate 211, the base plate 211 is provided with a mounting hole 212 opposite to the strip hole 11; the fastener includes a bolt 23 and a nut 22, the bolt 23 passes through the strip hole 11 and the mounting hole 212, and is connected to the nut 22.

[0054] Specifically, a strip-shaped hole 11 is provided on the fixed base 1, and the width of the strip-shaped hole 11 is slightly larger than the diameter of the bolt 23 to ensure that the bolt 23 can move smoothly within the strip-shaped hole 11. A mounting hole 212 is machined on the base plate 211, which is opposite to the strip-shaped hole 11 of the fixed base 1, and the diameter of the mounting hole 212 is adapted to the diameter of the bolt 23. One end of the bolt 23 is passed through the strip-shaped hole 11 of the fixed base 1 and the mounting hole 212 on the base plate 211, and then a nut 22 is screwed onto the end of the bolt 23.

[0055] In this embodiment, the connecting rod is limited by the base plate 211, and the slotted hole 11 allows the limiting plate 21 to move continuously along the axis of the cylinder 51, enabling precise fine-tuning of the pipetting volume. This meets the diverse needs of different experiments for pipetting volume and improves pipetting accuracy. The limiting plate 21 can be easily moved and fixed by loosening and tightening the nut 22. The operation is simple and convenient, requiring no complicated tools or steps, and saving time for adjusting the pipetting volume.

[0056] As an optional implementation, there are two strip holes 11, which are located on both sides of the length direction of the pull rod 3.

[0057] Specifically, the two strip holes 11 are located on both sides of the length of the tie rod 3, providing a more stable moving track for the limiting plate 21. The strip holes 11 on both sides together constrain the moving direction of the limiting plate 21, preventing the limiting plate 21 from deviating or shaking during movement, so that the limiting plate 21 can move accurately along the axis of the cylinder 51.

[0058] As an alternative implementation, the mounting surface 13 is provided with a scale 12 along the length of the strip hole 11.

[0059] Since the syringe 5's barrel 51 is typically marked with graduations, users can directly adjust the position of the limiting plate 21 according to these graduations. However, this adjustment requires first pulling the piston 52 to the desired graduation on the barrel 51, then moving and fixing the limiting plate 21. This process may cause the piston 52 to move during the movement or fixing of the limiting plate 21, resulting in a significant error in the pipetting volume. In this embodiment, by setting graduations 12 along the length of the slot 11 on the mounting surface 13, users can quickly adjust the position of the limiting plate 21 for different experiments. It should be noted that the graduations 12 on the mounting surface 13 can correspond one-to-one with the graduations 12 on the barrel 51, or the graduations 12 can be set according to the pipetting volumes required for several frequently performed experiments.

[0060] As an optional implementation, the length of the mounting hole 212 is the same as the length of the cylinder 51.

[0061] By setting the length of the mounting hole 212 to match the length of the cylinder 51, the full stroke of the piston 52 rod can be limited and adjusted. The full stroke of the piston 52 rod refers to the period from when the piston 52 has not drawn any liquid to when the piston 52 has drawn the maximum amount of liquid.

[0062] As an alternative implementation, the fastener is a clamp, which is clamped between the surface of the fastener away from the fixing base 1 and the side of the fixing base 1 away from the mounting surface 13.

[0063] Optionally, the clamp can be an existing C-type clamp, F-type clamp, etc., which can clamp the fastener to the mounting surface 13 of the fixed base 1.

[0064] As an optional implementation, see [link to implementation details]. Figure 3 The limiting plate 21 also includes a side plate 213, which forms an L-shaped structure with the bottom plate 211. A guide hole 214 is provided on the side plate 213, through which the pull rod 3 passes. The side plate 213 is used to limit the connection 4.

[0065] Specifically, by providing a guide hole 214 on the side plate 213, the size of the guide hole 214 is the same as the size of the pull rod 3, or the size of the guide hole 214 is slightly larger than the size of the pull rod 3. The guide hole 214 is used to guide the pull rod 3, thereby improving the straightness and stability of the pull rod 3 during movement and reducing the liquid transfer error caused by the offset of the pull rod 3.

[0066] It is easy to understand that the cylinder 51 can guide the piston 52. In this embodiment, by providing a guide hole 214 on the side plate 213, it can be combined with the guiding effect of the cylinder 51 on the piston 52 to further improve the straightness and stability of the pull rod 3.

[0067] As an optional implementation, see [link to implementation details]. Figure 1 A handle 8 is fixed to the other end of the lever 3. The handle 8 allows for convenient control of the movement of the lever 3, improving pipetting efficiency. The lever 3 and handle 8 can be integrally molded, or the handle 8 can be glued or screwed onto the lever 3.

[0068] As an optional implementation, see [link to implementation details]. Figure 1 The fixing element consists of at least two sleeves 6, the number of which is the same as that of the syringe 5. The axial direction of the sleeves 6 is the same as that of the cylinder 51, and the outer side wall of the cylinder 51 is bonded to the inner side wall of the sleeves 6.

[0069] Specifically, the inner diameter of the sleeve 6 can be the same as the outer diameter of the barrel 51, or the inner diameter of the sleeve 6 can be slightly larger than the outer diameter of the barrel 51. By bonding the inner wall of the sleeve 6 to the outer wall of the syringe 5, a strong connection is formed.

[0070] Optionally, since the sleeve 6 is annular, directly bonding it to the mounting surface 13 of the fixed base 1 could easily cause the axial directions of multiple sleeves 6 to be inconsistent. To ensure that the axial directions of multiple sleeves 6 are consistent when mounted on the fixed base 1, see [reference needed]. Figure 4 At least two limiting grooves 14 can be provided on the fixed base 1. The number of limiting grooves 14 is the same as the number of sleeves 6, and the length direction of the at least two limiting grooves 14 is the same. After the sleeves 6 are installed in the limiting grooves 14, they can be glued together to increase the parallelism of the sleeves 6.

[0071] As an optional implementation, see [link to implementation details]. Figure 5 , Figure 6 The fixing component is a mounting base 7, which has at least two receiving grooves 711. The number of receiving grooves 711 is the same as the number of syringes 5. The extending direction of the receiving grooves 711 is the same as the axial direction of the cylinder 51. The outer wall of the cylinder 51 is bonded to the receiving grooves 711.

[0072] Specifically, the mounting base 7 has a first surface 71 and a second surface 72 that are opposite to each other. The first surface 71 is mounted on the mounting surface 13 of the fixed base 1 and can be connected by means of adhesive bonding or screws. The second surface 72 is recessed along the direction close to the mounting surface 13 to form a receiving groove 711. This receiving groove 711 can be semi-circular, and its diameter can be the same as the outer diameter of the cylinder 51. See also Figure 5The length of the mounting base 7 can be the same as the width of the fixed base 1, improving aesthetics; the receiving groove 711 is formed by a reverse indentation in the thickness of the mounting base 7, and the length of the receiving groove 711 extends through the entire width of the mounting base 7. By bonding the outer wall of the cylinder 51 to the receiving groove 711, the axes of each cylinder 51 can be kept parallel to each other.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A pipetting device, characterized in that, The utility model relates to a fixed base, with mounting surface, fixed part, fixed on the mounting surface, at least two syringes, the syringe includes cylinder and piston, one end of the piston is located in the cylinder and is arranged along the axis of the cylinder sliding, the outer side wall of the cylinder is fixed on the fixed part, the axis of the cylinder of at least two syringes is parallel to each other, connecting piece, fixed on the other end of the piston of at least two syringes, pull rod, one end of the pull rod is fixed on the connecting piece, limiting piece, installed on the mounting surface, the limiting piece can move along the direction of the axis of the cylinder to limit the movement of the connecting piece along the direction of the axis of the cylinder. The utility model relates to a fixed base, with mounting surface, fixed part, fixed on the mounting surface, at least two syringes, the syringe includes cylinder and piston, one end of the piston is located in the cylinder and is arranged along the axis of the cylinder sliding, the outer side wall of the cylinder is fixed on the fixed part, the axis of the cylinder of at least two syringes is parallel to each other, connecting piece, fixed on the other end of the piston of at least two syringes, pull rod, one end of the pull rod is fixed on the connecting piece, limiting piece, installed on the mounting surface, the limiting piece can move along the direction of the axis of the cylinder to limit the movement of the connecting piece along the direction of the axis of the cylinder. The utility model relates to a fixed base, with mounting surface, fixed part, fixed on the mounting surface, at least two syringes, the syringe includes cylinder and piston, one end of the piston is located in the cylinder and is arranged along the axis of the cylinder sliding, the outer side wall of the cylinder is fixed on the fixed part, the axis of the cylinder of at least two syringes is parallel to each other, connecting piece, fixed on the other end of the piston of at least two syringes, pull rod, one end of the pull rod is fixed on the connecting piece, limiting piece, installed on the mounting surface, the limiting piece can move along the direction of the axis of the cylinder to limit the movement of the connecting piece along the direction of the axis of the cylinder. The utility model relates to a fixed base, with mounting surface, fixed part, fixed on the mounting surface, at least two syringes, the syringe includes cylinder and piston, one end of the piston is located in the cylinder and is arranged along the axis of the cylinder sliding, the outer side wall of the cylinder is fixed on the fixed part, the axis of the cylinder of at least two syringes is parallel to each other, connecting piece, fixed on the other end of the piston of at least two syringes, pull rod, one end of the pull rod is fixed on the connecting piece, limiting piece, installed on the mounting surface, the limiting piece can move along the direction of the axis of the cylinder to limit the movement of the connecting piece along the direction of the axis of the cylinder. The utility model relates to a fixed base, with mounting surface, fixed part, fixed on the mounting surface, at least two syringes, the syringe includes cylinder and piston, one end of the piston is located in the cylinder and is arranged along the axis of the cylinder sliding, the outer side wall of the cylinder is fixed on the fixed part, the axis of the cylinder of at least two syringes is parallel to each other, connecting piece, fixed on the other end of the piston of at least two syringes, pull rod, one end of the pull rod is fixed on the connecting piece, limiting piece, installed on the mounting surface, the limiting piece can move along the direction of the axis of the cylinder to limit the movement of the connecting piece along the direction of the axis of the cylinder. ​ ​ 2. The pipetting device of claim 1, wherein ​ 3. The pipetting device of claim 2, wherein, ​ ​ ​ 4. The pipetting device of claim 3, wherein ​ 5. The pipetting device of claim 3, wherein ​ 6. The pipetting device of claim 3, wherein ​ 7. The pipetting device of claim 2, wherein ​ 8. The pipetting device of claim 1, wherein, ​ 9. The pipetting device of any one of claims 1-8, wherein, ​ 10. The pipetting device of any one of claims 1-8, wherein, ​

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