The system can be configured to operate with a single thermoregulator controlling the jacket temperature of both vessels simultaneously, or with two thermoregulators controlling the temperature of each vessel independently. Rapid exchange of both vessels independently, with quick-release vessel clamp and hose couplings. The choice of manifold kits allows two vessels to run from a single thermoregulator or two separate thermoregulators. The system accepts two overhead stirrers which can be moved independently.