I've been researching how to wire a dual float switch to control liquid level in a grant without a clear understanding of how to do it with any certainty. I found this on ebay and it looks like it should work, but I was wondering if anyone else had used on to control a 110v chugger type pump for use with a grant vessel. They say you can use just wire for sensors, but I don't know how sanitary that would be in this application.