Abstract: A wheel-nut locking clamp for locking neighboring wheel-nuts to prevent them from turning, said wheel-nut locking clamp including a first portion, a second portion and an intermediary portion. The first portion and the second portion are each provided with a flange located at the perimeter of respective through holes, the flanges being arranged at an angle relative to the first and second portions, respectively, so that the flanges extend away from said wheel-facing side, and the flanges being provided with a plurality of protruding elements extending towards a center axis of the through holes.

Abstract: A device for treating samples, for example collection of fractions from a chromatographic separation process, comprises a series of test containers (11), a treatment unit (5) and an apparatus (4) for creating relative motion between the test containers and the treatment unit. The treatment unit passes the test containers in sequence and subjects the same to one or more treatment steps. According to the invention the test tubes are detected and their position indicated by a sensor (9) which is arranged to trigger the treatment step or steps when contacting a given area on the respective test container (11), especially by the resilient biasing of a spring (13).