A sensor system for sensing liquid level in a bilge, for use in automatic bilge pump actuation. First and second field effect sensors are potted or sealed within a container or the bilge wall and are aligned in a vertical array and each comprise a substantially planar pattern of “electrodes” or conductive...http://www.google.fr/patents/US7373817?utm_source=gb-gplus-shareBrevet US7373817 - Solid state fluid level sensor
