My take on DIY temperature control for developing

Nodda Duma

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Step 1:



Step 2: (stainless pan from making maple syrup)



Step 3:



Check:




Took about 5 minutes to set up and then about 5 minutes to heat up the ~2 gallons of water from 80F to 100F. That was before I put a towel under the pan to insulate. The heating element is made for heating up a cup of coffee or soup. The instructions for the controller are surprisingly clear and straightforward to operate (I actually watched the video on their ebay auction where they said "we made the instructions really clear" in pretty good English. They convinced me!). There is a temperature offset adjustment so you can calibrate to whatever thermometer you trust (for me it's my beer-making thermometer). Set to heat (vs. cool down), the control temp and accuracy and off you go! The pump is just a fishtank pump that keeps water circulating. Provides for very good, consistent temperatures throughout the water except maybe right near the heating element. I measured < 1/2 degree deviation from where the thermocouple is shown sitting in the water.

All off eBay for $56.29 (that's per set and includes 2 heating elements). Well, the pan was just a food serving pan I had laying around used in Feb/Mar for boiling maple sap down to syrup. I don't remember what that was...maybe $35 but it's practically free since I can't recall for sure! Key requirement was that the controller operates on and supplies 110V AC, so I can just plug in everything without wiring. Perfect!

Next step: E-6!
 
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pbromaghin

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Nice setup. Those heaters when I started college. Mine heated up exactly one cup of coffee before starting on fire and melting, 2 seconds after I took it out of the water while it was still plugged in. They must have made them safer in 40 years, right?
 
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Nodda Duma

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From the ad: "Always unplug the heater before removing it from water! ". Sounds like good advice! I just unplugged the controller from the wall first which also cut power to the heater.
 
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Ron789

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Nice setup!
You can actually use that very same setup for sous-vide cooking. Any sort of meat, poultry, fish, vegetables or whatever can be prepared in this device and will taste delicious.
 

pbromaghin

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Should read "Those heaters were very popular when I started college." Damn near burned my room up, and maybe the whole dorm.
 
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