Apparatus (1) for determining crystallization solidification curves of chocolate mass and other fat masses adapted to be arranged onto an opening (21) in a supply conduit (3) for tempered chocolate mass from a tempering apparatus. The apparatus (1) is comprising an outer housing part (22) arranged at the outer periphery (23) of the supply conduit (3) and an inner housing part (24) having a channel (26) and a measurement chamber (36) therein extending in through the opening (21) in radial direction towards the center of the conduit (3). A temperature sensor (28) is arranged in the piston (27) and measures the temperature of the mass sample (44) when the inner housing is cooled and the sample is solidifying in the chamber (36).A plurality of openings (39) are arranged around the inner housing part (24) for flow of chocolate mass between the conduit (3) and the measurement chamber (36) in the channel (26). After the temperature measurement is concluded, the inner housing part (24) is heated and the solidified sample (44) in the measurement chamber (36) is melted and being exposed by the piston (27) through the plurality of openings (39) into the mass flowing in the conduit (3). Especially surprising is it, that the measurement chamber can be maintained fully in the flow of chocolate in the conduit as the sample is being cooled and temperature measured. Then the inventive solution provides the unique advantage that the sample can be heated in the same position and disposed directly out into flow of chocolate in the conduit, only by the return travel of the piston.
