Patent ID: 8925382
Filing Date: 2015-01-06
Classification: G01F

Abstract:
1. A system for measuring a volume of a liquid, the system comprising: a keg having a nozzle and a dip tube extending from said nozzle into said keg, said keg having a volume of liquid therein; a coupler affixed to said nozzle, said coupler having a gas flow path and a liquid flow path, said gas flow path opening through said nozzle into said keg, said liquid flow path connecting to said dip tube; a first transducer port cooperative with said gas flow path so as to measure a pressure of gas in said gas flow path; a second transducer port cooperative with said liquid flow path so as to measure a pressure of liquid at a location above said nozzle of said keg, said liquid flow path being unobstructed along said dip tube to a location above a middle of said coupler and above said first and second transducer ports, said coupler having a ball check valve positioned in said liquid flow path above said first and second transducer ports; and a controller connected to said first and second transducer ports so as to measure a difference between the measured pressure of the gas and the measured pressure of the liquid and to convert the measured difference into a value corresponding to a volume of the liquid in the keg.