A floatless liquid level gauge assembly utilizing polymeric resistive/conductive elements is provided which measures the liquid level of partially conductive or conductive liquids in a tank using a three terminal voltage divider network or a two terminal voltage or current network. The polymeric resistive/conductive...http://www.google.com.au/patents/US5501102?utm_source=gb-gplus-sharePatent US5501102 - Floatless gauge with resistive/conductive polymer
