Filtered micropipette tip for high/low volume pipettors

A pipette device for pipetting micro volumes of liquid, said device comprising:

• a pipettor selected from a group of manual, air displacement pipettors having a tapering insert tip for insertion into a pipette tip having a tapering insert chamber, said pipettor group consisting of (i) a pipettor operable to pipette volumes up to and including 20 microliters and having a relatively long insert tip, (ii) a pipettor operable to pipette volumes up to and including 200 microliters and having a relatively short insert tip, and (iii) an intermediate pipettor operable to pipette volumes up to and including 100 microliters;
• a single pipette tip body having a mounting end, an intermediate section, a distal fluid contacting end, and an axial bore including collinear insert and fill chambers extending in continuous tapering configuration from said mounting end to the fluid contacting end;
• and
• a filter means positioned within the axial bore in the intermediate section, the position of said filter means providing a dividing barrier between the insert and fill chambers of the pipette tip device;
• said fill chamber extending from the fluid contacting end to a distal side of the filter means and having a volume of at least 200 microliters;
• said insert chamber having a tapering internal wall structure configured to receive a terminal insert portion of each of the three respective pipettors of 20 microliters, 200 microliters and 100 microliters in a snug, sealed fit within the insert chamber;
• said single pipette tip being removably inserted on at least one of the respective pipettors with the filter means being positioned sufficiently deep within the axial bore and intermediate section of the pipette tip body to allow the terminal end of the insert portion of each of the three respective pipettors to seat within the insert chamber without contacting the filter means.