Spray.  Water spray is available in both the Xe-1 and the Xe-3.  Spray can be programmed during either the light or dark cycles.  Spray nozzles are located at the top of the exposure chamber.

Chiller.  Chiller is available for both the Xe-1 and Xe-3.  It is used to lower temperatures when testing heat sensitive materials.  The Xe-1 with chiller is configured so that the chiller is essentially a “permanent stand” for the tester.   For an Xe-3, the chiller is a separate unit that requires additional floor space.