Abstract: An electricity generator including a suspended membrane resting on a frame, the membrane bearing alternating thermoelectric tracks connected in series and each having one end on the frame and one end on a central part of the membrane, wherein the membrane is deformable, the central parts of the membrane being intended to be in mechanical and thermal contact with a heat source.

Abstract: The invention relates to a calorimeter including at least one measurement sensor (4) for receiving at least one sample, and at least three stages (1, 2, 3) for controlling the temperature, with decreasing size, each including a mounting (10, 20, 30) and means for controlling the temperature, the smallest stage being associated with said at least one sensor (4), in which: a first stage (1) also includes a screen (11) forming a first enclosure with the mounting (10) of said first stage; a second stage (2) is placed inside (12) said first enclosure and the mounting (20) thereof is thermally coupled with the mounting (10) of the first stage by first thermal conductances (23) comprising Peltier elements; and a third stage (3) is placed inside the second enclosure defined by the second stage and is thermally coupled with said second stage (2) by second passive thermal conductances (33) defining an adapted time-constant value.

Abstract: A sensor for differential calorimetric measurement including a thermometric cell and another cell, each cell including: a membrane of a low thermal conductivity material, having first and second surfaces; and a mechanism supporting the membrane, of a high thermal diffusivity coefficient material, in contact with the first surface of the membrane, the thermometric cell including at least two active thermometric elements located on the first surface of the membrane, the two cells configured to be assembled such that the second surfaces of the membranes of the cells are opposite one another, a sample and a reference used for taking measurement configured to be placed between the two membranes and directly in contact with the second surfaces, and at least one of the cells including a sealing mechanism opposite the first surface of the membrane, wherein a free space for a gas is arranged between the sealing mechanism and the membrane.

Abstract: The invention relates to a calorimeter including at least one measurement sensor (4) for receiving at least one sample, and at least three stages (1, 2, 3) for controlling the temperature, with decreasing size, each including a mounting (10, 20, 30) and means for controlling the temperature, the smallest stage being associated with said at least one sensor (4), in which: a first stage (1) also includes a screen (11) forming a first enclosure with the mounting (10) of said first stage; a second stage (2) is placed inside (12) said first enclosure and the mounting (20) thereof is thermally coupled with the mounting (10) of the first stage by first thermal conductances (23) comprising Peltier elements; and a third stage (3) is placed inside the second enclosure defined by the second stage and is thermally coupled with said second stage (2) by second passive thermal conductances (33) defining an adapted time-constant value.

Abstract: A sensor for differential calorimetric measurement including a thermometric cell and another cell, each cell including: a membrane of a low thermal conductivity material, having first and second surfaces; and a mechanism supporting the membrane, of a high thermal diffusivity coefficient material, in contact with the first surface of the membrane, the thermometric cell including at least two active thermometric elements located on the first surface of the membrane, the two cells configured to be assembled such that the second surfaces of the membranes of the cells are opposite one another, a sample and a reference used for taking measurement configured to be placed between the two membranes and directly in contact with the second surfaces, and at least one of the cells including a sealing mechanism opposite the first surface of the membrane, wherein a free space for a gas is arranged between the sealing mechanism and the membrane.