Patent ID: 6223595
Filing Date: 2001-05-01
Classification: G01F

Abstract:
A fluid level sensing system useable for sensing the level of conductive and partially conductive fluids in a container, the system comprising:a first elongated fluid level resistive element portion disposed substantially vertically in the container;a second elongated fluid level resistive element portion disposed substantially vertically in the container;a first elongated temperature resistive element portion disposed substantially vertically in the container;a second elongated temperature resistive element portion disposed substantially vertically in the container, a second end portion of the second elongated temperature resistive element portion electrically coupled to a first end portion of the first elongated fluid level resistive element portion;an input signal source electrically coupled to a first end portion of the first elongated temperature resistive element portion;the first and second elongated temperature resistive element portions and the first and second elongated fluid level resistive element portions electrically connectable by fluid in the container,whereby an output signal across the first and second elongated fluid level resistive element portions is proportional to a fluid level in the container, and the first and second elongated temperature resistive element portions offset variations in the output signal resulting from variations in temperature.