Patent ID: 7255004
Filing Date: 2007-08-14
Classification: G01F

Abstract:
1. A system for measuring a fluid level in a tank, comprising: a level-sensing probe adapted to be positioned in a tank containing a fluid such that said probe substantially spans the height of the tank, said probe divided into a plurality of sections with each of said sections including (i) a fluid-level capacitive sensor disposed along the length thereof, (ii) an inductor electrically coupled to said capacitive sensor, (iii) a sensor antenna positioned for inductive coupling to said inductor, and (iv) an electrical conductor coupled to said sensor antenna; an electrically non-conductive housing adapted to be accessible from a position outside of the tank; a plurality of housing antennas arrayed in a pattern within said housing with each of said housing antennas electrically coupled to said electrical conductor from a corresponding one of said plurality of sections; and a magnetic field response recorder having a measurement head with a plurality of transceiving antennas arrayed therein to correspond to said pattern of housing antennas, said measurement head including means for mechanically coupling said measurement head to said housing wherein each of said housing antennas is substantially aligned with a specific one of said transceiving antennas.