Originally Posted by RichBenn
my plan is to put it between the PID and the SSR, without any way to defeat.
Yeah, this definitely seems like the most straight forward approach. I use hop bags though and am worried about a bag snagging onto the switch and tricking the system. I suppose if you had some kind of buzzer or light indicator to let you know the float switch was triggered you could remedy it pretty easily.
I still like the idea of being able to bypass the float when it is time to boil, since I know I wont be running into chances to dry fire at that point. But I suppose that does leave me the chance to leave the switch in bypass mode on the next system start up...