The Julabo F25 Refrigerated/Heating Circulator is suitable for temperature application to external systems with simultaneous operation in the bath tank. The F25 provides high heating/cooling capacity to ensure rapid heat-up and cool-down times. The typical applicaitons for the circulator include: Temperature applications to external, closed systems, such as for example photometers, refractometers, viscometers, etc. For simultaneous application to small objects in the circulator bath.