ABSTRACT
This chapter begins by explaining thermal and other signals. For a correct understanding of calorimetry, knowledge of thermodynamics is necessary; however, space permits an introduction only. An overview of the most important types of calorimeters, followed by some of the many applications, will then be presented. For those who want to do measurements without having to make their own devices, an overview of the most important calorimeters, and their vendors and approximate prices will be given. One of the forms in which energy can be present in a system is the random, internal kinetic energy of the particles (molecules or atoms) of a system, which can intuitively be called "thermal energy." The chapter concludes with some hints on present and future developments, and on further reading, since there is a large amount of literature on calorimeters.
