DOH! Yeah that would actually work, ugh, time to order another T and valve haha. Sometimes my brain doesn't work.
Also some additional info was asked for in the wood brew stand thread on the temp probes, thought I'd add it here too.
I use the waterproof DS18B20 probes connected to a Raspberry Pi which is mounted to the brew stand. I use two different "models" of DS18B20's, both are waterproof, one is just
"high temp" (the white cabled probes) where the cable jacket is PTFE (vs PVC) and rated up to ~250F.
The DS18B20's are 1-wire probes, and therefore work best when connected in a bus configuration. My first attempt using these probes with the RP was in a "star" configuration, and it was extremely unstable (probes drop, temps unreadable, etc), since I switched to a bus, no issues at all. I'm in IT and have tons of it so I chose to use standard Cat-5 cable/keystone jacks to run my bus. Rather than trying to splice and connect lots of tiny wires together, I decided to just try and use Cat-5 keystone jacks and punch down both wires (the probe and the Cat-5 cable) into the jack. This "spliced" both wires together, and gave me a jack to plug another Cat-5 cable into to extend the bus. The "white boxes" are simply surface mount keystone boxes ($1.50 at Home Depot), with one of the keystone ports blanked.
As always, pictures tell it all:
HLT "box"/probe going into HLT thermowell
Run between two boxes
Both cables, punched down into same keystone
Eventually runs back to this box, where the RP lives, yes wires are a bit of a mess there, tacking those down is on the "to-do" list
For the connections where I'm reading inline temps (BK out, CFC Wort out, CFC H2O in) I use
these probe compression fittings from
Brewhardware.com
For the HLT/MLT, I use
these thermowell's from
Brewhardware.com
For the actual interface, it is just a combination of Python scripts (which actually talk to the probes/store temps in database) and PHP/Javascript (using
this library for the actual gauges) that I hacked together and access via a webserver running on the RP. The temps on the web interface are automatically refreshed about every second for each probe (depending on probe delay). It is still a work in progress, but usable.