Calorimetry requires little or no sample pretreatment; solids, liquids and gases can all be analyzed. When heat is produced in a sample, isothermal calorimetry measures the heat flow. The sample is placed in an ampoule that is in contact with a heat flow sensor that is also in contact with a heat sink. When heat is produced or consumed by any process, a temperature gradient across the sensor is developed. This will generate a voltage, which is measured. The voltage is proportional to the heat flow across the sensor and to the rate of the process taking place in the sample ampoule. This signal is recorded continuously and in real time. For each sample there is a reference that is on a parallel heat flow sensor. During the time that the heat flow is monitored, any temperature fluctuations entering the instrument will influence both the sample and the reference sensors equally. This architecture allows a very accurate determination of heat that is produced or consumed by the sample alone while other non-sample heat disturbances are efficiently factored out.
TAM represents an ultra-sensitive heat flow measurement which is complementary to TA Instruments differential scanning calorimeters. Based on the pioneering Thermometric technology, TAM offers maximum sensitivity, flexibility, and productivity. It can be used with the most sensitive microcalorimeters and a wide variety of accessories to control the experimental conditions.