ah, just found the eevblog threads on this (did not come up on search but did come up on google search).
what I'd like to find out, once I get mine, is if there is a simple jumper to change C to F or if its hardcoded per model. there is a C and an F orderable model and they are not the same model #.
yeah, after reading a bit more, the 3 terms are just a 2 term K tcouple with a 3rd support wire.
I would not spend a lot on this. never would I think to spend $200 on it! but for $15, ok, I'll see what its about.
otoh, I already have a few tcouples and dmm's that read type-K's directly. this was more an impulse buy from a vendor I already was placing an order with. but might be an interesting tear-down. I have not seen any schematics for this online and no high res photos of its insides, either, so I'll shoot some when I get it.