System making it possible to know if a product fresh frozen has undergone an interruption of the cold chain.

摘要

It consists of two tubes closed at one end (1) and (2), one of smallest diameter (1) penetrates into the other (2). br / a spring (6) which is compressed by the displacement of the tube (1) during its introduction into the tube (2) exerts a pressure on the walls (7) and (8), a locking system (3) and (4) holds the closed system. & br / of the water to be coloured (5) fills the tube formed by the two tubes which are imbricated. & br / the expansion of this liquid (5) at the moment of freezing it exerts a force on the walls (7) and (8) which, by sliding the tube (1) released (3) and (4). br / due to a temperature rise of the ice will melt and the spring being released, the force that it exerts on (7) and (8) will separate the two tubes (1) and (2) and the liquid (5) is in the dye spread.