> Capacitance will change as a function of water purity. > > Andy > ...but this is not necessarily a bad thing or hard to deal with: http://209.146.243.45/product.htm for capacitative liquid sensing alice -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! use mailto:listserv@mitvma.mit.edu?body=SET%20PICList%20DIGEST