posted on Jul, 6 2006 @ 03:17 PM
You should do some patent and industry searches first. I don't know what, if anything, is new and non-obvious about your invention, but I have seen
many a liquid level sensor, some of them optic.
You may have invented something you can just go buy. I do it all the time, sadly enough, and it's really sad when you find out your new gadget that,
after all, really was a good idea, got patented six months earlier by MIT or LANL.