A collection of devices used as part of a photopheresis system for extracorporeal photoimmunetherapy to treat immune disorders, especially cutaneous T-cell lymphoma (CTCL). It typically consists of tubing (patient and fluid lines), fluid/blood component bags, a dedicated centrifuge bowl, a photoactivation chamber, connectors, and clamps. It conducts blood from the patient to the system's main unit, aids in blood processing, and returns leukocyte-enriched and untreated components of the blood after irradiation. This is a sterile, single-use device.