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Old 11-26-2012, 09:15 PM   #1
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Default Temp controllers

In the market to buy a temp controller for my new chest freezer/fermentation chamber.
Which control do people like, the Johnson digital or the Ranco ETC.
Slainte

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Old 11-26-2012, 09:20 PM   #2
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Can you follow a wiring diagram? If so, check out the many threads on the STC-1000. It's sold as an aquarium controller on eBay. Works great. I have 3 now.

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Old 11-27-2012, 12:47 AM   #3
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Another vote for the STC-1000. Best $25 I have spent recently, and I am about to buy another one.

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Old 11-27-2012, 02:05 AM   #4
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I have the Johnson and it works great. I wouldn't like to try a controller with a freezer that doesn't have some way of preventing the freezer from continually switching on and off. (Freezer compressors are expensive, and continually starting and stopping can burn out the compressor.)

-.a

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Old 11-27-2012, 02:18 AM   #5
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Quote:
Originally Posted by ajf
I have the Johnson and it works great. I wouldn't like to try a controller with a freezer that doesn't have some way of preventing the freezer from continually switching on and off. (Freezer compressors are expensive, and continually starting and stopping can burn out the compressor.)

-.a
The STC-1000 has a compressor delay setting. I think default is 3 minutes but can be turned up to 10.
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Old 11-27-2012, 02:41 AM   #6
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I've got the Johnson A19 (analog). This is the analog one. Pretty simple gadget. There's a dial on the front. Dummy proof, especially if you get it pre-wired.

I also have a Control Products Dual-stage controller. It is far nicer than the A19. It has two 30A relays for both hot and cold control. So, you can plug your freezer into one side of it, and a small cheap ceramic heater into the other and it will maintain your temps year round (see second link for the heater I'm using).

I will say that it is a chore to wire. I do this for a living so I knew what to do and got it right the first time - still took me 30 minutes of carefully stripping wire, etc. But for the novice without any tech skills, this might be a problem.

Programming it is straightforward, but still not as easy as the A19 (which requires no programming).

The Johnson A419 (digital) is probably the best single-stage controller that does not require a bunch of wiring.

http://www.amazon.com/gp/product/B00...ls_o01_s00_i00

http://www.amazon.com/Lasko-100-MyHe..._bxgy_hi_img_y

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