Vortex Tube operated cabinet enclosure coolers such as the Nex Flow Frigix-X Panel Coolers operate utilizing compressed air wherein one end gets hot, and the other end gets cold. They find applications in particularly dirty environments as well as hot and wet factory climates.
Because of the rough environments they are subjected to, the materials of construction are quite important. Some manufacturers utilize stainless steel with the vortex tube (cold temperature generating portion) then packaged in an aluminum housing and assembly, usually not anodized. So after a short time, the appearance of the aluminum, especially if not anodized in such environments look quite deteriorated.
But it is in especially in hot and humid environs where the combination of stainless steel with aluminum can be a problem due to the possible effect of galvanic corrosion between these two very dissimilar metals. I have personally seen a vortex style cabinet enclosure cooler with a big gaping hole on its aluminum housing due to this corrosion effect.
So if choosing vortex tube operated cabinet enclosure coolers it is a good idea to check what they are made off. Nex Flow makes them from stainless steel. Both the vortex tube and the housing and attachments are stainless to avoid this corrosion issue. Stainless steel obviously will hold up much better than aluminum in a nasty factory environment as well.
Nex Flow manufacturers specialized compressed air products for blow off, cooling and moving c/w quality accessories for controlling, monitoring and filtering compressed air.