PoolDuino - Automate my pool with Arduino

Guys
How about these
http://arduino-direct.com/sunshop/index.php?l=product_detail&p=151

When I was repairing spa controllers, they used a stainless sleeve into the filter housing, and a cable gland that sealed against the sleeve.
If you do it that way, use a bit of heat transfer paste (white stuff used between a transistor and the heatsink) to improve the thermal transfer.

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