How to buy a pipette

A pipette, also known as a pipette, is an appliance used to quantitatively transfer fluids
.

When conducting research in analytical testing, pipettes are generally used to pipette small or trace amounts of liquid
.

Pipettes can be divided into gas piston pipettes and external piston pipettes
according to the principle.

Gas piston pipettes are mainly used for standard pipetting, and external piston pipettes are mainly used to handle volatile, viscous and other liquids
.

So how do we buy a pipette? 1.
Product performance, that is, the accuracy and repeatability
of the pipette.

For the vast majority of users, it is difficult
to detect product performance before purchasing.

Therefore, it is mainly based on the technical data
provided by the manufacturer.

But don't easily believe the seller's verbal promises, and consult the written materials provided by the
manufacturer.

2.
The reliability of the product Depends mainly on the material
used in the pipette.

For the housing, there should be high impact resistance, corrosion resistance and low thermal conductivity (such as PVDF material); For pistons, there are three main materials
on the market: stainless steel, ceramic and plastic.

Stainless steel has good mechanical properties and long life, but it is not suitable for pipetting with strong acids and alkalis; Ceramics have high corrosion resistance, but have poor
mechanical properties.

Of course, materials often mean higher prices, so it is necessary to consider a combination of purchase price and longevity
.

3.
The ergonomic design of the product can mainly consider the following points: The short distance of the thumb to complete a pipetting cycle means higher comfort; Compare the thumb force required for a single drain (to press to the end) of a pipette of the same volume, which affects comfort, and the less force means the less risk of finger injury caused by long-term use; Loading and unloading tips, the same is the more labor-saving the better; The weight of the pipette is moderate, too heavy will increase the burden on the hand, but too light also often means that the material may be slightly worse; Other auxiliary designs, such as the frosted design of the housing and the design of the finger hook, help to further improve comfort
.