Title :
Indirect conductivity measurement of liquids in flexible containers
Author :
Nihtianov, Stoyan N. ; Meijer, Gerard C M
Author_Institution :
Lab. of Electron. Res., Delft Univ. of Technol., Netherlands
Abstract :
This paper presents an indirect method for measuring the conductivity of liquid foods, packed in flexible TEA (Tetra Brik Aseptic) food-containers. The method is intended for intensive (100%) non-invasive sterility-testing of aseptically packed liquid food-products. It can also be applied for other containers, which have similar construction. An electric model is developed for the measured impedance, which consists of a few components. Some of them are dependent on the conductivity σ of the liquid. Relation is derived between the active component R of the measured impedance and the conductivity of the food. The sensitivity and the robustness of the method is investigated with respect to its application under industrial conditions and experimental results are presented
Keywords :
electric impedance measurement; electrical conductivity measurement; equivalent circuits; food processing industry; nondestructive testing; packaging; production testing; safety; Tetra Brik Aseptic food-containers; active component; aseptically packed food-products; electric model; flexible containers; impedance measurement; improved product safety; indirect conductivity measurement; industrial conditions; liquid foods; nondestructive sterility testing; noninvasive sterility-testing; robustness; sensitivity; small surface electrode; threshold sensitivity; transfer function; Circuits; Conductivity measurement; Containers; Electric variables measurement; Electrical products industry; Electrodes; Food products; Food technology; Impedance measurement; Liquids;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 1997. IMTC/97. Proceedings. Sensing, Processing, Networking., IEEE
Conference_Location :
Ottawa, Ont.
Print_ISBN :
0-7803-3747-6
DOI :
10.1109/IMTC.1997.610260
