Abstract: A pipetting aid device includes a support comprising a face, a plurality of light elements mounted in the support forming a two-dimensional array in the plane of the face, and first and second centering structures. The first and second centering structures are mounted to extend from the face of the support. The first centering structure includes a first and second pair of stop walls, wherein a pair of stop walls forms a corner. The second centering structure includes a third and fourth pair of stop walls. The first and third pairs of stop walls form corners of a first positioning zone of a first type of plate. The second and fourth pairs of stop walls form corners of a second positioning zone of a second type of plate. The first centering structure and the second centering structure are positioned outside both the first positioning zone and the second positioning zone.

Abstract: A pipetting aid device is provided that includes a support comprising a first face, a plurality of light elements mounted in the support to form a two-dimensional array in the plane of the first face, a first centering structure, and a second centering structure. The first centering structure and the second centering structure are mounted to extend from the first face of the support. The first centering structure includes a first pair and a second pair of stop walls, wherein a pair of stop walls forms a corner. The second centering structure includes a third pair and a fourth pair of stop walls. The first pair and the third pair of stop walls form corners of a first positioning zone of a first type of plate. The second pair and the fourth pair of stop walls form corners of a second positioning zone of a second type of plate. The first centering structure and the second centering structure are positioned outside both the first positioning zone and the second positioning zone.