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if you really need to make sure that everything is insulated though and want to make sure 100% that you wont have any problems with condensation etc get a pot of liquid electrical tape and paint the whole pcb (except for the ccd of course)
this is a method i have used to protect a mainboard when cooling a cpu to -45c and it works well, ice was formed over the top of the liquid electrical tape but i had no problems at all.
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