I realize this may be a little late to the game, but I'm doing a DS-ETC as well, using the STC-1000, and wanted to ask if any of you had ideas on the best thermocouple(s) to use with fermentation buckets/better bottles?
Obviously temp swings on the wort/beer would be slow due to heat cap of the liquid, so would it just be best to use the included probe and keep the ambient steady(ish), or monitor closer in proximity to the fermentor? Seems obvious which one is right (ambient; distance doesn't matter, but keep away from direct contact with source), but wanted to make sure. Enclosed cases will vary (1-2" rigid insul DIY, dorm fridge, chest freezer), but principle should be the same regardless, yeah?
A thing worth noting (as seen on other threads), pay attention to inductive vs resistive loads on/across the heating/cooling relays. Taking the AC/DC caveat out of the equation, Resistive (coils, pads, lights, etc) are probably safer as they typically have no start-up/inrush currents, but inductive (motors, fans, fridges/freezers, etc) FREQUENTLY have said currents, so bear that in mind when attaching the peripherals to the relays. SSR's are a good safety catch if you're uncertain (fry those instead of the STC, or use slow-blows to minimize your exposure). Using that practice, I'd imagine the STC to hold up against whatever you could throw at it. Guess I'll find out.