A system comprising a calorimeter (1) for measuring a heat flux of a sample comprises a recipient space (6) for a sample container (10) containing a sample, a heat sink (4), a first heat transducer (2) whereby the first heat transducer (2) comprises a heat receiving surface 5 (24) in contact with the sample container (10) when the sample container (10) is positioned in the recipient space (6) and a heat absorbing surface (25) in contact with the heat sink (4). A second heat sink (3) is provided, whereby the second heat sink (3) has a second heat receiving surface (34) in contact with the heat sink (4) and a second heat absorbing surface (35) in contact with the sample container (10), when the sample container (10) is positioned 10 in the recipient space (6).
