I've drawn up so far a simple block diagram of such a system with a humidity sensor to keep the TEC just above dew point using a microcontroller. Probably best for me to first get my water cooling monster of a system into action.
http://forums.procooling.com/vbb/sho...?t=7442&page=9
Nothing is built yet, though I have got the humidity and temp sensors. A real voltage out humidity sensor is not cheap, eg the Honeywell ones are 50 bucks each. Capacitance style ones need calibration and are a pain. I think the humidity sensor of choice is the Honeywell HIH-3610
No plans for commercialization, just for my own fun. Last time I looked there were a few commercial offerings, but none were cheap. If someone had a 350-400w controller with dew point control for a sane price, they could move watercooling to a whole new level.
If all goes wrong with my own project, I'll have a hell of a coke can cooler.
link1896