1. Product performance, that is, the accuracy and repeatability of the pipette for the vast majority of users, the majority of users, before the purchase of the product performance testing is both difficult and unnecessary. Therefore, it is mainly based on the technical data provided by the manufacturer. However, two points should be made here: first, do not easily believe the verbal promises of the seller, always consult the written material provided by the manufacturer; second, in the global pipette market, the influence of the brand, such as SOCOREX, EPPENDORF and GILSON, etc., the technical data provided by the more credible.
2. The reliability and durability of the product depends mainly on the materials used in the pipette. For the shell, there should be high impact resistance, corrosion resistance and low thermal conductivity (such as PVDF material); for the piston, there are mainly stainless steel, ceramic and plastic materials on the market. Stainless steel has good mechanical properties, long life, just not very suitable for strong acid and alkali pipetting; ceramics have high corrosion resistance, but poor mechanical properties. Of course, quality materials often mean higher prices, so you need to consider the purchase price and life factors.
3. The ergonomics of the product can be considered as follows:
First, a shorter distance for the thumb to travel to complete a pipetting cycle means greater comfort;
Second, compare the amount of thumb force required to complete a single drain of a pipette with the same volume range (be sure to press to the bottom), this is a key factor in comfort, the less force required means less risk of finger injury from prolonged use;
Third, compare the amount of thumb force required to complete a single drain (always press to the bottom) of a pipette with the same volume range.
Third, when loading and unloading the tip, again, the less effort the better; fourth, the pipette is moderately weighted, as too much weight puts a strain on the hand, but too little weight often means that the material may be less than optimal; and fifth, other aids, such as frosted housing and finger hooks, can help to further improve comfort.