Calorimetric measuring apparatus

A calorimetric measuring apparatus comprising a decomposition vessel whose interior is configured as a reaction chamber and which can be tightly sealed, said decomposition vessel (2) being removably arranged inside a jacket and having a first temperature sensor for the measurement of temperature attained inside the decomposition vessel, said jacket surrounding the decomposition vessel (2) being configured as a heat sink (6) and having at least some portions made of a material having good thermal conductivity with a high heat capacity, said heat sink (6) having inner surfaces (9) spaced from outer surfaces (10) of the decomposition vessel (2) thereby forming a first thermal insulation space (11), an outer housing (13) which surrounds the heat sink (6) having inner surfaces (16) spaced from outer surfaces (15) of said heat sink, thereby forming a second thermal insulation space (17), and a temperature equalization device (19) adapted for receiving a second decomposition vessel 22, said device (19) being connected to a computing and control unit (18) and being connected to a temperature sensing means located at a wall zone of said heat sink for determining the temperature of the heat sink (6), the first temperature sensor and the temperature sensing means also being connected to the computing and control unit (18).