Steve

Also ideal for storing photocopy paper: you'ld be surprised at how the
quality of the image improves if the paper is stored at 10% RH. :-)

Brian

"Stephen R. Gregory" wrote:
>
> 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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