Originally Posted by jkarp
I've been thinking along the very same lines as a couple people now who've built CB20s have burned up their elements by letting the kettle run dry. If anyone comes across an inexpensive, but reliable liquid sensor that can handle boiling temps, I'd love a ping.
Yuri and I have been collaborating on a bubbler level sensor with promising results. It's nice because it is no contact and self cleaning. I've had to shelve it on my end for a few weeks but it is high on the list of things to get done. It will require a logic controller to use however.
All that said, a float switch is still the best and closest to bullet proof configuration. A prox-switch solution may be just as viable as a float, but that needs further investigation as well.