Pipetting system comprising a pipetting device and a displacement device, wherein said pipetting device is in particular an air pipetting device or a fluid pipetting device or valve-controlled pipetting device, and wherein said displacement device comprises: - a first fluid space separated into a first chamber and a second chamber by a first piston displacement area (A 1) of a first piston being arranged in a movable manner within said first fluid space, said first chamber of said first fluid space being connectable to said pipetting device, said first piston being actuatable by an actuation volume (V a) of working fluid of said pipetting device; and - a second fluid space separated into a first chamber and a second chamber by a second piston displacement area (A 2) of a second piston being arranged in a movable manner within said second fluid space, said second piston being actuated in dependence on said first piston being actuated by said actuation volume (V a), said second piston being constructed to displace a displacement volume (V d) of a fluid located within said second chamber of said second fluid space when being actuated in dependence on said first piston being actuated by said actuation volume (V a), wherein said actuation volume (V a) is different from said displacement volume (V d), and wherein said first fluid space and said second fluid space are removably connected, and wherein said displacement device is connected to said pipetting device, in particular by means of removable sticking to a pipette tube of said pipetting device. wherein said pipetting device is in particular an air pipetting device or a fluid pipetting device or valve-controlled pipetting device, and wherein said displacement device comprises: - a first fluid space separated into a first chamber and a second chamber by a first piston displacement area (A 1) of a first piston being arranged in a movable manner within said first fluid space, said first chamber of said first fluid space being connectable to said pipetting device, said first piston being actuatable by an actuation volume (V a) of working fluid of said pipetting device; and - a second fluid space separated into a first chamber and a second chamber by a second piston displacement area (A 2) of a second piston being arranged in a movable manner within said second fluid space, said second piston being actuated in dependence on said first piston being actuated by said actuation volume (V a), said second piston being constructed to displace a displacement volume (V d) of a fluid located within said second chamber of said second fluid space when being actuated in dependence on said first piston being actuated by said actuation volume (V a), - a first fluid space separated into a first chamber and a second chamber by a first piston displacement area (A 1) of a first piston being arranged in a movable manner within said first fluid space, said first chamber of said first fluid space being connectable to said pipetting device, said first piston being actuatable by an actuation volume (V a) of working fluid of said pipetting device; and - a second fluid space separated into a first chamber and a second chamber by a second piston displacement area (A 2) of a second piston being arranged in a movable manner within said second fluid space, said second piston being actuated in dependence on said first piston being actuated by said actuation volume (V a), said second piston being constructed to displace a displacement volume (V d) of a fluid located within said second chamber of said second fluid space when being actuated in dependence on said first piston being actuated by said actuation volume (V a), wherein said actuation volume (V a) is different from said displacement volume (V d), and wherein said first fluid space and said second fluid space are removably connected, and wherein said displacement device is connected to said pipetting device, in particular by means of removable sticking to a pipette tube of said pipetting device.