The small-footprint C200 Calorimeter-system is especially designed for economical determination of the gross calorific values of both solid and liquids. It is ideal for technical schools and universities for classroom instruction and training and also finds application in industrial laboratories with low loads. The simple system comprising of a decomposition vessel (C 5010), an oxygen filling station (C 248) and some consumables required for installation and calibration. The water and oxygen is filled manually. It allows four methods of working; these include manual, time-controlled dynamic and isoperibolic, allowing an optimum tuning of the various operating jobs. Validation of results is done according to a multiplicity of standards such as DIN 51900, ISO 1928 and ASTM D240/D4809/D5865/D1989/D5468/E711.