Originally Posted by swem
Is a thermowell less accurate?
I think they just respond slower to changes in temp. That could result in PID overshoot.
Seems like with a simple change to the code the same hardware could maintain HLT temperature and control a pump for a HERMS mash control. I am, of course, assuming it could handle a second temp sensor. If the manufacturer is willing to consider a firmware change, I'd buy one to control the complicated half of my herms rig and run a simple phase angle SSR for the boil kettle.
*edit* Whatever controls the pump outlet would also have to have the ability to run PID control. That's less likely than input for a second therm probe I think.
*edit again* after more thought, it's basically a complete start over on the software to do this.