Abstract: A heat exchange system for controlling the temperature of the blood of a patient. The heat exchange system comprises a disposable component having a blood inlet to receive blood from the patient and a blood outlet to return blood to the patient, and a permanent component. The permanent component includes a first housing having an inlet and an outlet to exchange thermal fluid with an external device and a second housing having an inlet and an outlet to exchange thermal fluid with the external device. The disposable component is inserted between the first housing and the second housing, such that in a closed position of the permanent component, a first surface of the disposable component is pressed into contact with a surface of the first housing and a second surface of the disposable component is pressed into contact with a surface of the second housing.

Abstract: A water monitoring system comprising a hydrogen peroxide sensor configured to determine a concentration of hydrogen peroxide in water in a conduit. The hydrogen peroxide sensor further comprises an ultraviolet light sensor configured to determine an ultraviolet light absorbance level of the water in the conduit. The ultraviolet light absorbance level is used to determine the concentration of hydrogen peroxide. The hydrogen peroxide sensor may further comprise a visible light sensor configured to determine a turbidity level of the water in the conduit. The turbidity level also is used to determine the concentration of hydrogen peroxide.