The temp probes are not water proof, however, you may be able to use them in water if you cover it with epoxy on the entire sensor and any wire connection involved!!
If you are working on a project, you can post pictures on our gallery. I would like to see it.
I working on alot of stuff with my case, and one of the mods envolves my mx5 and mount location as well as a new acrylic resevoir im building. I'll throw some pics up when all is done, just dont hold your breathe