Hi Guy!

I'm like you, the physics make me feel a little lightheaded too. But, we 
fairly recently bought some desiccant cabinets from McDry, and they keep the 
humidity down to 4% inside the cabinets...and that's here in Oklahoma, we see 
humidity levels at 80-90% quite often here. McDry's claim to fame is that a 
desiccant cabinet will actually pull moisture out of devices over a period of 
time...something that dry nitrogen cabinets can't do. You can check their 
charts out at:

http://www.seikausa.com/mcdry/page5.html

I actually think that you could make beef jerky inside these 
cabinets...hehehe.

They are a little pricey, but when you consider the costs of inerting a 
cabinet with nitrogen, and the added aspects of a desiccant type system, I 
think they're worth it.

With these cabinets all you do is plug them into a standard receptical, and 
forget about it. The desiccant is self regenerated by the system...

-Steve Gregory-

<< Anyone out there ever considered drying moisture sensitive devices by
 lowering the pressure in a storage vessel?
 
 It is difficult to achieve 40°C and less than 5%RH when ambient RH is 50-60
 percent. So, someone called and asked how long he would need to keep the
 parts at a pressure equivalent of 80,000 ft above sea level, temperature at
 room ambient to dry out parts.
 
 No one here had considered it before. The physics made me feel like I was at
 altitude.
 
 Guy Ramsey
 Senior Lab Technician / Instructor
 
 
 E-Mail: [log in to unmask] <mailto:[log in to unmask]>
 Ph: (610) 362-1200 x107
 Fax: (610) 362-1290 >>

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