Pipettes, Dispensers, Liquid Handling
Pipettes - applications
The pipette is without doubt one of the most important laboratory devices and consumables and is used for dispensing minute amounts of fluid in modern laboratories. In the micro-litre range, pipetting is nowadays an indispensable part of everyday work in a routine laboratory. Our top-class pipettes by the pipette manufactures Socorex, Bürkle, Hirschmann or Accumax / Fine Care Biosystems are employed in laboratories of all kinds, ranging from chemistry and biology to medicine and pharmaceuticals. Accordingly we offer a series of different pipettes and pipetting methods which are used in experimental and industrial laboratories, educational and research institutions, at universities, colleges, hospitals, medical practices or pharmacies. Depending on the area of application, pipetting system and dispensing method certain requirements must be observed when pipetting in the laboratory. In our range you will only find high-precision and easy to use certificated and calibrated pipettes that fulfil the requirements of the latest methods and working techniques. We are happy to advise you in selecting the most suitable pipette for your applications in the laboratory: contact form; tel.: + 49 (0) 3338 - 7510456.
Pipette - types
Pipettes come in different designs, sizes and types - all dependent on the area of application, fluids, dispensing and pipetting methods or pipetting aids required. The best-known and simplest pipette is the measuring pipette which consists of a glass tube and printed-on volume scale. This classic pipette narrows at the tip and at the other end is either open or closed with a pipetting aid, a rubber or Peleus ball with valves. Measuring pipettes are suitable for different fluid quantities and are more flexible than, though not as precise in dispensing as full pipettes which only have one or two markings for a defined volume. Further pipette types are disposable pipettes/ single-use pipettes made of plastic for simple dosing work with low dosage precision requirements. These disposable pipettes are frequently used in medicine, for example in the dosing of medications such as eye, ear or nose drops. A conventional Pasteur pipette consists of a glass tube with a volume of 2 ml and a diameter of around 5-7 mm which narrows to a point at the lower end and at the upper end has a rubber suction bulb. This type of pipette has no markings showing the volume. Pasteur pipettes are for dispensing small quantities of fluid and are available as PE-LD dispensable pipettes for single use. Even when filled, Pasteur pipettes can be frozen in a freezer.
Micropipette: Forming part of more modern mechanical pipetting are piston pipettes also known as micropipettes. A micropipette consist of a piston system and an interchangeable pipette tip made of plastic as a result of which it is suitable for laboratory work with frequently changing substances or concentrations. With these micro-litre pipettes the pipetting of very small volumes is possible: from 0.1 µl to 5000 µl. In piston pipettes an air cushion between the pipette piston and the fluid is moved which draws in the sample and dispenses it again. Manual micropipettes operate on the principle of displacement: by pressing the movable piston down the air in the pipette tip is displaced. In the subsequent upward movement the air column and thereby also the fluid sample is drawn upwards into the pipette tip. In the case of such micropipettes only the pipette tip comes into contact with the fluid. Positive displacement piston pipettes operate without an air cushion. These positive displacement systems have pipette tips with an integrated piston which comes into direct contact with the sample fluid, thereby allowing the pipetting of highly viscous solutions. After each pipetting procedure the pipette tip with the piston is replaced Electronically-controlled piston pipettes are micropipettes which are particularly suitable for repetitive laboratory work, as they relieve the thumb and can to some extent also be used as a hand dispenser, also known as multipette.
Multichannel pipette: Micropipettes with several channels are known as multichannel pipettes. As in the case of the single channel pipettes the sample fluid only comes into contact with the pipettes tips. These piston pipettes have 8 or 12 simultaneously operated channels. The adjacent channels are arranged in the grid pattern of microtiter plates (standard: 8 rows x 12 columns) so that they can be rapidly processed. With this pipetting method large sample quantities can be pipetted considerably more quickly.
Pipettes - calibration
As pipettes are used intensively in everyday laboratory work, pipette calibration and pipette care are fundamental for precise pipetting in the laboratory, in research, medicine or industry. To check the accuracy of the single and multichannel pipettes and to assure data integrity regular pipette tests, cleaning, calibration or repair is necessary. Our micropipettes are all supplied with an ISO 8655 calibration report and can easily and frequently be recalibrated. For testing the pipettes with laboratory scales an appropriate evaporation trap is applied to the scales as a testing and calibration aid. Rapid and reliable solutions for pipette calibration are available in the form of special pipette calibration software. A number of the offered pipettes can be completely autoclaved.
Pipettes - accessories
Our robust pipettes are characterised by their long service life and user convenience as well as the possibility of replacing or adding individual components. Depending on the pipette type you can order various components and pipette accessories such as pipette cleaners, pipette tips, pipette stands, pipette carousels, pipette holders, microtiter plates, cleaning agents, chargers for electronic single and multichannel pipettes as well as many other elements for the offered pipettes.