PIPETTER

摘要

A micropipetter with a plurality of hollow needles (120) to deliver fluid, the needles (120) anchored in a sample block (150); a needle guide assembly (130) with a plurality of needle guide shafts (134) and compression springs (132) attached at one end to the sample block (150) and at the other end to a needle guide plate (140), each spring (132) surrounding a needle guide shaft (134), and the needle guide plate (140) controlling the spacing of the needles; a sample block (150) having a plurality of hollow, tapered spaces, each of which connect with the hollow needle (120); a displacement volume block (160) having a plurality of hollow spaces, each being occupied by a piston pin (166), each piston pin (166) being sealed with a stationary seal assembly (154); a stationary sheet seal (154) located between the sample block (150) and the displacement volume block (160), the sheet seal (154) having a plurality of holes corresponding to the spaces in the sample block (150) and the displacement volume (160) such that precise volume displacement is provided.