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

摘要

The invention relates to a method and a device for determining the volume of liquid remaining inside a flexible pouch (2) initially filled with a volume V_i of a liquid to be consumed and provided with means for dispensing the liquid to be consumed, the method comprising positioning the pouch inside a rigid envelope (6) filled with a known volume V₁ of a first measuring liquid having an electrical conductivity C₁, during the dispensing of a volume V_A of liquid to be consumed, introducing, into 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 C_M of the mixture of the measuring liquids present inside the rigid envelope, determining the volume V_A of liquid to be consumed, which has been dispensed on the basis of the measurement of the electrical conductivity C_M, and calculating the volume V_r of liquid to be consumed remaining inside the pouch on the basis of the volumes V_i and V_A.