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Old 06-13-2012, 03:24 PM   #1
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Default Cheaper temp controller for ferm. chamber. Maybe?

IF a guy wired a connection inside his ferm. chamber and hooked the fridge to this, would it work to control usual ale fermentation temps as a cheaper alternative to Johnson and Ranco thermostats?

http://www.amazon.com/dp/B000E7NYY8/...430_pe_vfe_dt2

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Old 06-13-2012, 04:08 PM   #2
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It could but you could only control ambient temp due to the short length of the thermocouple. Ambient temp can be quite different than fermentation temp.

When looking for a cheaper alternative i found this:
http://www.homebrewtalk.com/f51/ebay...-build-163849/

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Old 06-13-2012, 04:21 PM   #3
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Quote:
Originally Posted by Bheher View Post
It could but you could only control ambient temp due to the short length of the thermocouple. Ambient temp can be quite different than fermentation temp.

When looking for a cheaper alternative i found this:
http://www.homebrewtalk.com/f51/ebay...-build-163849/
Which might lead a guy to set the temp a few degrees cooler than actually needed? Surely more consistent than a swamp cooler. I am pretty much totally ignorant of electronics. Would not any controler set the ambient temp inside the refrigerator? Not really getting the picture. Yours is cheaper though and I may just get it. You have it set up yet?
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Old 06-13-2012, 05:41 PM   #4
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A couple of reasons.. You won't be measuring the heat generation by the fermentation, but more importantly the sensor will be too sensitive. As soon as it gets a bit of cold air on it, it will shut off, then it will turn on again shortly after that. Some of that can be prevented in the unit itself, but hard to say without buying it and testing that. Using the ebay controller I put it on the carboy under a sock and then used a bungee cord to hold it in place. The cycle time was pretty low, and held a pretty steady temperature.

Also, this is a single stage controller, you will only be able to cool, not heat and cool. Depending on your environment it may or may not be an issue.

I converted my freezer with the ebay controller and it works great! The whole project only took a few hours, which includes building a wood collar to increase the height. The hardest part is finding the right part on ebay. Make sure it is 110volt and it is a dual stage controller.

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Old 06-13-2012, 09:09 PM   #5
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Well ok then, the heck with my idea

I ordered one of the aquarium heater/cooler controls on eBay. It'll give me another project when it comes.........just what I need!

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