Abstract: A method and a device for monitoring the handling conditions of at least one object intended to be handled under certain predetermined conditions. The temperature or the temperature as a function of time of at least one object, is monitored to enable it to retain as much as possible of its original quality. To this end, a device is inserted into the object, or between two objects in a stack of objects, including a substantially flat, elongate casing, having a slot-shaped space between two opposed walls of the casing. An elongate slide-shaped body removably inserts into the slot-shaped space of the casting. At one end the slide-shaped body is provided with a technique for indicating, by color change, the exceeding and the falling-short of the predetermined conditions. The color change is thereafter observed visually by withdrawing the slide-shaped body removably inserted in the slot-shaped space of the casing.