Multipurpose Calorimeter with Microwatt Sensitivity is designed for continuous temperature-scanning, step-scanning and isothermal measurements of thermodynamics and kinetics. The Calorimeter has larger sample capacity that improves the accuracy of heat capacity determinations and makes possible studies of reactions of solutes in dilute solution. The Calorimeter is designed with wide-mouth, removable ampoules that allow study of materials that are physically not compatible with other calorimeters. Multipurpose Calorimeter with Microwatt Sensitivity can be availed in different specifications to suit individual requirement.