Patent ID: 6595051
Filing Date: 2003-07-22
Classification: G01F,H01H

Abstract:
A fluid level sensing and control system comprising:a housing, wherein the housing includes a cavity therein and a first and a second opening to the cavity; a diaphragm in sealing engagement with the first opening, wherein portions of the diaphragm are operative responsive to a pressure from a liquid disposed outside the cavity to move inwardly with respect to the first opening to thereby decrease the volume of the cavity; a biasing member in operative connection between the housing and the diaphragm, wherein the biasing member is operative to urge the portions of the diaphragm to move outwardly with respect to the first opening to thereby increase the volume of the cavity; a transducer in fluid communication with the second opening, wherein the transducer is operative responsive to a pressure in the cavity to produce an electrical signal that is representative of a depth level of the liquid; a controller device in operative connection with the transducer, wherein the controller device includes a depth range selection device that is configurable by an operator to select one of a plurality of depth ranges, wherein the controller device is operative responsive to the selected one of the depth ranges and the electrical signal to determine a fraction of the depth range that corresponds to the depth level of the liquid.