Patent ID: 6508585
Filing Date: 2003-01-21
Classification: A61K,A61P,G01N

Abstract:
A differential scanning calorimeter comprising: a heat sink made of a superior heat conductive material having a space for setting a sample and reference material inside; an insulating substrate fixed inside the heat sink and provided with a first region for mounting the sample and a second region for mounting the reference; a first circuit pattern having junctions of two kinds of alloy or metal at each of the first and second regions; a differential thermal detection circuit for detecting a temperature difference between the sample and the reference mounted on the insulating substrate by detecting a difference in thermoelectromotive force between the junctions of the first region and those of the second region; second circuit patterns made of metallic resistors provided at each of the first and second regions; a differential heat compensation circuit for allowing appropriate current to flow in each of the second circuit patterns so as to continually return output of the differential thermal detection circuit to zero; a temperature program generator for outputting a target temperature value periodically; and a heat sink temperature controller for controlling the temperature of the heat sink in response to output of the temperature program generator, whereby the first circuit pattern enables the detection of the temperature difference without self heat generation which temperature difference is inputted to the differential heat compensation circuit.