Sounds very nice.
Funny that I have been making designs of my own for a Process Meter, but never though of including a thermometer with automatic compensation!

I assume that it would work fine with a Jobo rotary processor, by just dipping the meter inside the basin. Yes, the Jobo would keep the temperature constant but the Meter having memory and steps would make it really useful just as well. Plus, sometimes you are running the Jobo at a higher than normal temperature for one reason or another.