Integral XT circulators are ideal for precise temperature control of reactors and closed circuit systems. They feature a unique control principle that expands the upper and lower temperature ranges for this class of recirculators. This also allows for quick response to reactor temperature changes and highly efficient heating and cooling. Standard features include a detachable control module with hi-res backlit LCD readout, RS232/485 interfaces, editable programmer for up to 150 segments in five programs, air-cooled, and CFC free fluids.