user is able to readily exchange the operator interfaces 6 1 6 2 and hence equip the control device the way he desires for example the laboratory centrifuge will be delivered with only one operator interface 6 1 or 6 2 and the other operator interface 6 2 or 6 1 will be delivered later in case of need or will be exchanged it is also possible to deliver the laboratory centrifuge with the two operator interfaces 6 1 6 2 from the very beginning so that the user may employ the operator interface of his choice at any time the pivoting holder 11 allows to pivot the control device 4 1 4 2 to a pivoted position as desired by the user and the dententing device 13 enables it to be locked in the position concerned the locked condition may be cancelled by an actuation of the unlocking button 14 the above disclosure is intended to be illustrative and not exhaustive this description will suggest many variations and alternatives to one of ordinary skill in this art all these alternatives and variations are intended to be included within the scope of the claims where the term u201c comprising u201d means u201c including but not limited to u201d those familiar with the art may recognize other equivalents to the specific embodiments described herein which equivalents are also intended to be encompassed by the claims further the particular features presented in the dependent claims can be combined with each other in other manners within the scope of the invention such that the invention should be recognized as also specifically directed to other embodiments having any other possible combination of the features of the dependent claims for instance for purposes of claim.