At 11:05 AM 1/10/99 -0600, you wrote:
>On Fri, 8 Jan 1999 19:23:33 +0000, Peter L. Peres wrote:
>
>>  The other way is, to seal the circuit either in conformant sealing
>>compound (available as spray I think), or put it in a sealed container
>>(can be plastic) pressurized with dry air. Production facilities can do
>>this. This is the industrial way.
>
>We conformal coat boards all the time.  Several of our
>products go into Chicken/Turkey plants where condensation
>is a fact of life.   I would suggest that you use the box
>and a heater method as conformal coating is a real
>pain-in-the arse.  To get a good solid waterproof coating
>the board must be oil free,moisture free, the coating must
>be applied correctly, and it can't be too hot or too cold
>while drying.
>
>When done right though conformal coating is great.  I have
>boards that can run while held under a stream of tap water.

I use 3M potting compound.  My devices are run under water all the time,
and work perfectly.  That's my selling point over the competition.

Andy


==================================================================
  Andy Kunz - Montana Design - http://www.users.fast.net/~montana
==================================================================