Abstract: Heat fluxmeter incorporating a row of thermistors, whose electrical resistance varies significantly with the temperature and which are arranged on the outer surface of the container for accurately measuring the temperature thereof. The range of temperatures in the vicinity of the container is determined by means of a second row of thermistors. It is possible to deduce therefrom the heat flux leaving the container, i.e. the power emitted by the calorigenic material contained therein. The considerable sensitivity of this meter makes it possible to use it without excessively disturbing the thermal equilibrium so that the measurement can be carried out in a very short time.

Abstract: A heat seal monitoring device for a container, such as one containing a calogenic material, includes one or more seals, placed on a container surface element and having a plurality of electrically interconnected resistive components enclosed in a structure having a first material acting as a physical protection and a second material acting as a thermal insulation. Each initial cap seal is able to supply an electric signal representing the heat flux exchanged between the surface element and the seal.