A Reactor Master Pro System retains all the benefits of the a Reactor Master Basic System but also has the following additional benefits: More precise reaction temperature control Ability to use Atlas RTD sensors Ability to use Atlas Turbidity sensors Ability to use Atlas pH sensors Ability to upgrade to PC software (to control other manufacturer’s apparatus) A more precise reaction temperature is achieved by “closed loop” (PID) control of the reactor temperature sensor and the set point of the circulator (rather than simply “open loop” setting of a circulator bath temperature).  Connection of Atlas RTDs, pH and turbidity probes is possible via a node extension. Reactor Master Software is an easy to use PC based application for control and analysis of experiments.  The “drag and drop” interface means recipes can be created, changed and saved quickly and easily. The software can not only control circulators and stirrers, but almost any RS232 controlled device can be connected to the software via a Port (2101020) which plugs in to the computer’s USB connection.  Running reactions from the software allows responses to be continuously monitored and graphed with easy to use alarms and emergency control. Experiments can be modified “on-the-fly” and all reaction data is continuously logged to .csv data files making analysis easy. A Reactor Master Pro System contains: