METHOD AND DEVICE FOR DETERMINING THE VOLUME OF LIQUID REMAINING INSIDE A FLEXIBLE LIQUID-DISPENSING POUCH

摘要

A process and a device for determining the volume of liquid remaining inside a flexible pouch provided with means for dispensing the liquid to be consumed comprises placing the pouch inside a rigid envelope filled with a known volume V1 of a first measuring liquid having an electrical conductivity C1, during the dispensing of a volume VA of liquid to be consumed, admitting inside the rigid envelope the same volume of a second measuring liquid present outside the rigid envelope and having an electrical conductivity C2 different from the electrical conductivity C1, measuring the electrical conductivity CM of the mixture of the measuring liquids present inside the rigid envelope, determining the volume VA of liquid to be consumed which has been dispensed from the measurement of the electrical conductivity C3, and calculating the volume Vr of liquid to be consumed remaining inside the pouch from the volumes Vi and VA.