[Pneumatic micropipette].

Abstract

Plunger micropipettes commonly used in medicine, biology and virology have low accuracy, a narrow dose measuring range, and their manufacture, adjustment and servicing are labor-consuming processes. In this article the working principle of a pneumatic micropipette is analyzed. The elements of industrial pneumoautomatic equipment are shown to give the possibilities for realizing not only all the main functions of plunger micropipettes, but also some additional functions which cannot be performed by plunger pipettes. The design and working principles of a single-channel pneumatic micropipette are described. Pneumatic micropipettes are shown to have essential advantages over plunger micropipettes in the main technical characteristics, e. g. accuracy, a dose measuring range, operating convenience, etc.