NDLI: Ultrasonic technique for monitoring of liquid density variations.

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Ultrasonic technique for monitoring of liquid density variations.

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Ultrasonic technique for monitoring of liquid density variations.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Zukauskas, E. Sliteris, R. Kazys, R. Rekuviene, R. Mazeika, L.
Description	Country affiliation: Lithuania Author Affiliation: Kazys R ( Ultrasound Research Institute, Kaunas University of Technology, Barsausko st. 59, Kaunas LT-51368, Lithuania.); Rekuviene R ( Ultrasound Research Institute, Kaunas University of Technology, Barsausko st. 59, Kaunas LT-51368, Lithuania.); Sliteris R ( Ultrasound Research Institute, Kaunas University of Technology, Barsausko st. 59, Kaunas LT-51368, Lithuania.); Mazeika L ( Ultrasound Research Institute, Kaunas University of Technology, Barsausko st. 59, Kaunas LT-51368, Lithuania.); Zukauskas E ( Ultrasound Research Institute, Kaunas University of Technology, Barsausko st. 59, Kaunas LT-51368, Lithuania.)
Abstract	A novel ultrasonic measurement technique for density measurements of different liquids in extreme conditions has been developed. The proposed density measurement method is based on transformation of the acoustic impedance of the measured liquid. The higher accuracy of measurements is achieved by means of the λ/4 acoustic matching layer between the load and the ultrasonic waveguide transducer. Introduction of the matching layer enhances sensitivity of the measurement system. Sometimes, the density measurements must be performed in very complex conditions: high temperature (up to 200 °C), pressure (up to 10 MPa), and high chemical activity of the medium under measurement. In this case, the special geometry metal waveguides are proposed to use in order to protect the piezoelectric transducer surface from influence of a high temperature. The experimental set-up of technique was calibrated using the reference liquids with different densities: ethyl ether, ethyl alcohol, distilled water, and different concentration (20%, 40%, and 60%) sugar-water solutions. The uncertainty of measurements is less than 1%. The proposed measurement method was verified in real conditions by monitoring the density of a melted polypropylene during manufacturing process.
ISSN	00346748
Issue Number	1
Volume Number	86
e-ISSN	10897623
Journal	Review of Scientific Instruments
Language	English
Publisher	American Institute of Physics
Publisher Date	2015-01-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ultrasonics Methods Calibration Carbohydrates Chemistry Chelating Agents Equipment Design Ethanol Ethyl Ethers Models, Theoretical Polypropylenes Pressure Temperature Instrumentation Uncertainty Water Journal Article Research Support, Non-u.s. Gov't Discipline Physics Discipline Chemistry
Content Type	Text
Resource Type	Article
Subject	Medicine Instrumentation

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