Calibration Unit:
In sequence to bring the cell rapidly to thermal equilibrium, it is necessary to use calibration heater. It has two reasons, to determine the heat capacity of the system and to control the temperature in the cell itself. The heat evolved or absorbed is calculated from the temperature modify using the relationship.
?Q = ?TC´p
Where C´p is the heat capacity of the system that is measured as the amount of heat essential to raise the cell temperature through a unit.
Temperature Sensing System:
It is the heart of thermometric titrator. The principal temperature sensor is a thermistor that is temperature sensitive semiconductor whose resistance obeys the eq.
RT = A e B/T
where A and B are constants whose values depend on the nature of the thermistor. A thermistor has the benefits of being small size, fast response to temperature change and chemical resistance.