Flexible Fluid Level Sensor With Improved Measurement Capability

A capacitive fluid level sensor for sensing a level of a fluid within a vessel, the sensor positioned alongside the vessel ad separated from the fluid by a wall of the vessel, the sensor comprising:

• a flexible substrate capable of conforming to the wall of the vessel;
• an elongated conductive planar member supported by the substrate, the conductive members being aligned along a longitudinal axis of the substrate and a conductive ground grid surrounding the conductive member, the ground grid including a plurality of conductive traces arranged in a interconnected pattern, the traces defining a plurality of associated openings, each such opening being entirely enclosed by the traces;
• and
• a plurality of conductive traces extending between the conductive member and the ground grid and a connecting end of the substrate.