A calorimeter is an object used for calorimetry or the process of measuring the heat of chemical reactions or physical changes and heat capacity. Differential scanning calorimeters, isothermal micro calorimeters, titration calorimeters, and accelerated rate calorimeters are among the most common types. However, a simple calorimeter consists of a thermometer attached to a metal container full of water suspended above a combustion chamber. It is one of the measurement devices used in the study of thermodynamics, chemistry, and biochemistry.