In the concrete testing laboratory, they take day or 2 since casting 6"=20
x 12" concrete cylinders, and cure them generally 7 or 28 days in a 100%=20
humidity room. There are no controls, just some misting nozzles spraying=20
a small amount of water near the ceiling. Check with a local concrete=20
contractor for laboratory contacts.

On 7/24/2010 8:39 AM, Olin Lathrop wrote:
> V G wrote:
>   =20
>> I am concerned that water from the air may condense on the PCBs and
>> cause problems (such as undesirably conducting electricity, and so
>> on). Should I be worried about this?
>>     =20
> Yes.
>
>   =20
>> If so, what can I do about it?
>>     =20
> Put only the sensors in the chamber with the electronics in the normal ro=
om
> environment.  That's what wires are for.
>
>
> ********************************************************************
> Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products
> (978) 742-9014.  Gold level PIC consultants since 2000.
>   =20
--=20
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