Pipetting device, modular pipetting unit, pipetting system and method for pipetting of fluid samples

A modular pipetting unit comprising:

• at least one pipetting tip for pipetting of fluid samples;
• and
• a pump conduit for transferring a negative or positive pressure to said pipetting tip,
• wherein said pipetting tip and at least a portion of said pump conduit adjoining said pipetting tip mutually define a fluid sample conduit for accommodating said fluid samples.

A pipetting system, comprising:

• at least one pipetting unit which includes a pipetting tip for pipetting fluid samples and a pump conduit for transferring a negative or positive pressure to said pipetting tip, wherein said pipetting tip and at least a portion of said pump conduit adjoining said pipetting tip mutually define a fluid sample conduit for receiving said fluid samples;
• an automated positioning device for positioning of the at least one pipetting unit;
• and
• a controller for controlling pipetting of said fluid samples such that each pipetted volume of the fluid samples is smaller than a volume of said fluid sample conduit.