An electric device generates a predetermined amount of heat in the event of a malfunction. The inventive device comprises a latch articulated to a moving leaf of the door, and a control box attached to a fixed frame of the door and configured to receive and immobilize the tip of the latch into a passage provided therein. There is also provided an optical analysis disc system including a trigger mechanism having a trigger detector adapted to detect interruptions in grooves of an optical analysis disc.