Method for monitoring a flow of gas consumed from a cryogenic tank

摘要

The method involves measuring height (3) of a liquid oxygen bath (2) to obtain series of height measurements, and calculating series of similar quantities of gas (4) at rate corresponding to variation of volume of the bath during a predetermined time period. The similar quantities of gas are calculated by converting the measurement of height into volume of the bath, and dividing difference between the volumes to obtain flow of liquid consumed for separating the instants. An independent claim is also included for a device for monitoring compliance of treatment by a patient.