Abstract: A device for treating a fluid-like sample, in particular whole blood, with treatment fluid. The device comprises a tubular container with a first piston and a second piston, with a piston gap between them in which the treatment fluid is located in the initial position. The device further comprises an inlet port to which a capillary can be connected and an outlet port to which a filter can be connected.

Abstract: A method for determining the bending angle of a sheet which has been bent along a bending line, by generating at least one light beam, using these beams to project two points or line segments onto a part of the sheet to be checked which lies on one side of the bending line. The beams form an angle of incidence which is known in advance with the bending line of the sheet. These points or line segments are imaged onto receiving means and the distance between the points or line segments is determined, which have been projected onto the receiving means. The beams lie in two parallel detection planes, the distance between which is known. The bending angle is determined from the distance between the projected points, the known angles of incidence of the beams and the known distance between the detection planes.