Nice idea,
But are those sensors liquid proof?
Are there any?
They are not liquid or humidity proof. They output sound waves so any water proofing would obstruct measurement. Laser is another option.
I'm a mechanical engineer, and I have already built a semi automated brewing system, but have nothing yet to measure the output of the lautering process. With everything else automated, I sometimes forget to turn off the pump when I reach my wort run-off level. Depending on the style of beer the amount of wort run-off I need to collect is different, to set point needs to be easily adjusted (makes capacitive probes difficult). And the area is direct heated by propane which limits sensor (weight, pressure).
I am attempting to use the US for non-contact measurement. This will be mounted in an enclosure above the kettle on a rotating arm. The arduino, and electronics will be housed in the enclosure as well. When lautering is completed, the arm will be rotated out of the way and a cap placed over the US to protect it from steam in the boiling process.
Made huge progress last night. I think the programing in the project is reaching an end!