Patent ID: 7914201
Filing Date: 2011-03-29
Classification: G01K,G01N

Abstract:
1. A calorimeter for carrying out thermodynamic measurements on a sample comprising: a calorimetric head having: a thermal bath constructed and arranged to be held at a reference temperature substantially less than the temperature of the calorimetric head, an electronic control unit for setting heat flux delivered by the heating means to the cell and the first shield responsive to temperature signals determined by the temperature sensors, said control unit being suitable for keeping the cell and the first shield at a determined temperature difference, and at least a second hollow shield, or dynamical shield, arranged around the first shield in order to define therewith a determined volume, the second shield being adapted to limit the heat flux from the first shield towards the thermal bath, wherein said calorimetric cell provides an introduction/extraction duct that crosses said calorimetric head at least for a part thereof, said duct and said first shield being separated by a gap, and wherein said introduction/extraction duct crosses said first and said second shield for all its length and comprises a central portion made of a material with high thermal conductivity and two side portions made of a material with lower thermal conductivity.