For laboratories that want to perform both Solution and Semimicro Oxygen Bomb calorimetry tests, Parr offers the 6765 Combined Calorimeter. This includes the 6772 Calorimetric Thermometer module plus a calorimeter module and conversion parts for both the 6775 Solution Calorimeter and the 6725 Semimicro Calorimeter. This option has been popular with teaching laboratories that wish to include both types of experiments in their laboratory sessions.