On Mon, 21 Oct 2002, Tim McDonough wrote: *>On Sat, 19 Oct 2002 10:17:20 +1300, Brent Brown wrote: *>>You didn't list conductivity type probes. I have done a few of these *>>and I've posted to the PIClist on the topic before. Your application *>>could be well suited to this method, especially because you have a *>>grounded metal tank and non-explosive atmosphere. *> *>I'm not certain if a conductivity type probe would work in this *>application. The material in the tanks is comprised of a lot of oil *>which I believe is not conductive. In fact it's used as a coolant in big *>transformers, etc. Am I off base here? Go capacitive imho. Oil wants capacitive. Peter -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.