Design and implementation of a passive micro flow sensor based on diamagnetic levitation

Aydemir, Gizem and Koşar, Ali and Uvet, Hüseyin (2019) Design and implementation of a passive micro flow sensor based on diamagnetic levitation. Sensors and Actuators A: Physical, 300 . ISSN 0924-4247

This is the latest version of this item.

Full text not available from this repository. (Request a copy)

Abstract

This study presents a prototype of a micro-flow sensor based on magnetic levitation for the use in microfluidic systems. Accurate assessment of flow rates is crucial in the microfluidic system design. Micro-sensors utilizing levitation constitute an important topic in this regard. Diamagnetic levitation is an efficient technique, which is useful in applications with low power consumption and eliminates friction. With the proposed approach, zero mechanical contact in a microfluidic channel can be achieved. A sensor capable of accurately measuring flow rates was designed in this study. The corresponding flow rate range was between 1000 μL/min and 7000 μL/min. Levitation was accomplished with pyrolytic graphite and a ring magnet (NdFeB) acting as a lifter. The displacement of the micro-magnet in the micro channel in longitudinal direction was monitored via a microscope-camera system and was measured via a laser sensor above the lifter-magnet. A commercial analysis software (COMSOL Multiphysics Version 5.3 CPU License No: 17076072) was used for dynamic analysis and validation of experimental results. The flow rates were obtained using the data from the laser sensor via an exclusively coded C# program. The developed sensor prototype, which has the advantages of simple structure, small size and low cost, is a substantial candidate for the use in microfluidic devices requiring high accuracy.
Item Type: Article
Uncontrolled Keywords: Microflows; Microflow sensor; Magnetic levitation; Diamagnetic levitation; Pyrolytic graphite
Subjects: T Technology > T Technology (General)
T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Engineering and Natural Sciences > Academic programs > Mechatronics
Faculty of Engineering and Natural Sciences > Academic programs > Electronics
Faculty of Engineering and Natural Sciences
Depositing User: Ali Koşar
Date Deposited: 25 Aug 2020 12:39
Last Modified: 25 Aug 2020 12:39
URI: https://research.sabanciuniv.edu/id/eprint/40044

Available Versions of this Item

Actions (login required)

View Item
View Item