Humidity Control.  RH control is available in Xe-3 models.  These models simultaneously control, monitor and display Relative Humidity, Black Panel Temperature and Chamber Air Temperature.

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.

Back Spray.  Back spray is required by some SAE test methods;  it allows water to be sprayed on both the front and back of specimens, simultaneously.  

Dual Spray.  Dual spray is available for the Xe-3 only.  It allows a second liquid solution, such as an acid rain or soap solution, to be sprayed onto test specimens.  A large external reservoir, centrifugal pump and filter are attached to a portable cart.

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.