Patent ID: 6321597
Filing Date: 2001-11-27
Classification: G01F

Abstract:
A system for measuring the volume of a liquid in a subject chamber, the system comprising:an isolatable volume of subject-chamber control gas in communication with the subject chamber such that the total volume of the subject-chamber control gas and the liquid in the subject chamber may be held constant;a mouth through which liquid may flow into and out of the subject chamber;a pressure sensor in communication with the isolatable volume;a transfer system which causes a reference volume of the liquid to flow through the mouth; anda controller, which (i) controls the transfer system, (ii) receives pressure data from the pressure sensor before and after the reference volume of liquid has flown through the mouth, and (iii) calculates the volume of liquid in the subject chamber based on (a) the pressure data, (b) the reference volume and (c) the volume of gas in the subject chamber when the subject chamber is empty of liquid.