Abstract: A tempering device for laboratory vessels and having a liquid-tight housing formed, at least partially, of a plastic dyed with a heat sensitive dye and filled, at least partially, with a tempering medium, and further having depressions extending into the housing.

Abstract: The invention relates to a repetition pipette including a syringe receiving section for a mounting portion of a syringe, said pipette comprising a receiving member having a piston receiving portion for the mounting portion of a syringe piston, piston returning means for moving said receiving member away from said syringe receiving portion, piston advancing means for advancing said receiving member towards said piston receiving portion in steps corresponding to the liquid volumes to be ejected by the syringe, and step width adjusting means for adjusting the width of the steps of said receiving member by means of an adjustment element, characterized by constant step means for setting the width of the first step to a constant value independent of adjustments of said adjustment element for the widths of following steps.

Abstract: A pipette device, comprising a housing, an actuating element projecting from the upper end of this housing, a cylinder, a hollow piston moveable in this cylinder for displacing an air volume, a rod connecting this piston to this actuating element which is depressed against spring force to displace this piston, and an adapter cone for receiving replaceable pipette tips communicating with this cylinder. According to the invention the hollow piston comprises an outer tubular shell and an inner support which is preferably made of plastic material and to which the actuating element is connected by a coupling. The invention particularly refers to providing a variety of shells made of different materials which can be easily replaced.

Abstract: A pipette device having an elongate casing with a handle portion at its upper end and an actuating button slidably mounted in the casing and projecting outwardly from the casing at the upper surface of the handle portion. The actuating button is coupled to a piston that is slidably movable within a cylinder disposed within the casing. The lower end of the casing mounts a conical adapter member for receiving replaceable pipette tip members. The actuating button is urged upwardly so that it projects from the upper end of the casing by spring means. A detent means within the casing allows to depress the actuating button into the casing against the spring means by a first distance corresponding to the displacement of the pipetting volume.