There are many different features of a pipette to take into consideration before making your purchase, including ergonomics, low force, fitting, ease of use, reliability, accuracy and precision.
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Use the following decision tree to help narrow your equipment selection.
Pipettes are commonly used in the lab to aspirate and dispense a preset amount of liquid. Pipettes come in several designs for various purposes with differing levels of accuracy and precision
Air displacement pipettes are commonly used for aqueous samples and general lab work. They are driven by a piston within an air-tight sleeve that generates a vacuum through its vertical travel.
Manual air displacement pipettes are often more durable and better withstand the abuse of everyday lab use.
Single-channel manual air displacement pipettes are the Swiss army knives of liquid handling, capable of taking on any application in the lab.
Fixed volume pipettes are ideal for repetitive pipetting of constant volumes and are ideal if your pipetting needs seldom change.
Adjustable volume pipettes offer greater flexability for your pipetting needs and are available in a variety of volume ranges.
Multi-channel manual air displacement pipettes are ideal for applications that involve multi-well plates.
Electronic air displacement pipettes offer many advantages, but the most significant is the reduced force and fewer hand movements required for operation, which reduces the risk of repetitive stress injuries. Accuracy and precision are also often increased as there is less room for operator error.
Single-channel electronic air displacement pipettes offer greater accuracy and precision than their manual counerparts, while still capable of taking on any application in the lab.
Multi-channel electronic air displacement pipettes are ideal for high volume applications that involve multiwell plates.
Positive displacement pipettes are commonly used for heavy liquids or ones that are too viscous to be displaced accurately by air, as well as dense, volatile, radioactive or corrosive samples. These pipettes are driven by a disposable piston that comes in direct contact with the sample.
Repeating pipettes are used for repetitive serial pipetting. They are commonly used in applications such as biochemistry, immunology and microbiology where samples need to be rapidly dispensed in the same volumes.
Manual repeating pipettes are used when the same liquid needs to be dispensed into a number of samples, or when aliquoting stock bottles into smaller single-use containers.
Used for similar applications as their manual counterparts, but with less user fatigue and greater accuracy and precision.
Pipette controllers are used with volumetric or serological pipettes (glass or plastic tubes) which are marked to visually indicate volume. The user uses the controller to stop the flow at a desired position.
BrandTech Scientific Transferpette S -8/-12 Multichannel
The Transferpette S -8/-12 multichannel is the perfect manual pipette for demanding laboratory applications for scientists who prefer a central-button control layout.
BrandTech Scientific Transferpette S Single Channel
[b]The new benchmark[/b]
The Transferpette S pipettes were benchmarked against all of the leading instruments, incorporating the best features of each, to achieve an exceptional standard of comfort in a traditional design. The Transferpette S offers robust yet lightweight construction, superior autoclavability, simple one-handed operation, high degree of accuracy and precision, and Easy Calibration™ technology for long lasting reliability. Available as fixed-volume and digital models in volume ranges from 0.1uL to 10mL.
BrandTech Scientific Transferpettor; Positive Displacement
The Transferpett[u]or[/u] positive displacement pipette is the best tool for use with liquids that render traditional air-displacement pipettes ineffective. Unlike air displacement pipettes, the piston of the Transferpett[u]or[/u] directly expels the media from the tip, wiping the tip walls completely clean. This results in negligible residual wetting and highly accurate, reproducible results, especially with viscous, foaming, high-vapor-pressure, and other “problematic” liquids. Temperature of instrument and reagents must be between 59º and 104ºF (15º and 40º C).