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Special Issue "Micromechanical Flow Sensors for Microfluidic Applications"

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A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Physical Sensors".

Deadline for manuscript submissions: closed (31 July 2022) | Viewed by 4445

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Prof. Dr. Remco J. Wiegerink

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Guest Editor

Integrated Devices and Systems (IDS), University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands
Interests: mechanical microsensors; electronic interfacing of sensors; sensor packaging; force sensors; flow sensors; inertial sensors
Special Issues, Collections and Topics in MDPI journals

Prof. Dr. Joost Lötters

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Guest Editor

1. Integrated Devices and Systems (IDS), University of Twente, 7500 AE Enschede, The Netherlands
2. Bronkhorst High-Tech BV, Nijverheidsstraat 1A, 7261 AK Ruurlo, The Netherlands
Interests: design, modeling, fabrication and application of microfluidic handling systems; MEMS thermal and Coriolis flow sensors and controllers; MEMS pressure sensors; MEMS control valves; micromachined flow analysis systems; multiparameter flow measurement systems; micro Wobbe index meters
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In recent years, there has been a tremendous development towards fully integrated microfluidic systems. New devices not only show improved performance, but also result in a much higher level of integration that allows complete microfluidic systems to be implemented in a single chip or package. Integrated micromechanical flow sensors are key components in this development. Therefore, we are proud to announce this Special Issue entitled "Micromechanical Flow Sensors for Microfluidic Applications". The issue will bring together the most relevant work on state-of-the-art microfluidic flow sensing and its applications, including design and fabrication of the sensor chips, physical working principles, modeling, and simulation, and the measurement setups for characterization and calibration.

Prof. Dr. Remco Wiegerink
Prof. Dr. Joost Lötters
Guest Editors

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Sensors is an international peer-reviewed open access semimonthly journal published by MDPI.

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Keywords

flow sensors
microfluidic systems
integrated flow sensing

Published Papers (3 papers)

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Research

Open AccessCommunication

Optimal Design Parameters of Thermal Flowmeter for Fuel Flow Measurement

Igor Korobiichuk

and

Andrii Ilchenko

Sensors 2022, 22(22), 8882; https://doi.org/10.3390/s22228882 - 17 Nov 2022

Viewed by 919

Abstract

The article analyses the influence, relationship and value of the design parameters of the thermal flowmeter on its radial and axial heat fluxes in the tube. The purpose of the analyses is to check the change in the error of fuel flow measurement by the thermal flowmeter directly on the vehicle when using heating elements of different diameters. The influence of the radial heat flux of the flowmeter tube on the accuracy of fuel flow measurement is substantiated. Recommendations on the choice of design parameters of a thermal flowmeter at the stage of its design, development or use are developed under the condition of reducing the influence of the radial heat flow on the axial one, which will reduce the total error in the measurement of fuel flow rate. Full article

(This article belongs to the Special Issue Micromechanical Flow Sensors for Microfluidic Applications)

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Open AccessArticle

Digital Pregnancy Test Powered by an Air-Breathing Paper-Based Microfluidic Fuel Cell Stack Using Human Urine as Fuel

Irma Lucia Vera-Estrada

Juan Manuel Olivares-Ramírez

Juvenal Rodríguez-Reséndiz

Andrés Dector

Jorge Domingo Mendiola-Santibañez

Diana María Amaya-Cruz

Adrían Sosa-Domínguez

David Ortega-Díaz

Diana Dector

Victor Manuel Ovando-Medina

and

Iveth Dalila Antonio-Carmona

Sensors 2022, 22(17), 6641; https://doi.org/10.3390/s22176641 - 02 Sep 2022

Viewed by 1453

Abstract

The direct integration of paper-based microfluidic fuel cells (μFC’s) toward creating autonomous lateral flow assays has attracted attention. Here, we show that an air-breathing paper-based μFC could be used as a power supply in pregnancy tests by oxidizing the human urine used for the diagnosis. We present an air-breathing paper-based μFC connected to a pregnancy test, and for the first time, as far as we know, it is powered by human urine without needing any external electrolyte. It uses TiO

_{2}

-Ni as anode and Pt/C as cathode; the performance shows a maximum value of voltage and current and power densities of ∼0.96 V, 1.00 mA cm

^{- 2}

, and 0.23 mW cm

^{- 2}

, respectively. Furthermore, we present a simple design of a paper-based μFC’s stack powered with urine that shows a maximum voltage and maximum current and power densities of ∼1.89 V, 2.77 mA cm

^{- 2}

and 1.38 mW cm

^{- 2}

, respectively, which powers the display of a pregnancy test allowing to see the analysis results. Full article

(This article belongs to the Special Issue Micromechanical Flow Sensors for Microfluidic Applications)

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Open AccessArticle

Air Damping Analysis of a Micro-Coriolis Mass Flow Sensor

and

Sensors 2022, 22(2), 673; https://doi.org/10.3390/s22020673 - 16 Jan 2022

Viewed by 1309

Abstract

A micro-Coriolis mass flow sensor is a resonating device that measures small mass flows of fluid. A large vibration amplitude is desired as the Coriolis forces due to mass flow and, accordingly, the signal-to-noise ratio, are directly proportional to the vibration amplitude. Therefore, it is important to maximize the quality factor Q so that a large vibration amplitude can be achieved without requiring high actuation voltages and high power consumption. This paper presents an investigation of the Q factor of different devices in different resonant modes. Q factors were measured both at atmospheric pressure and in vacuum. The measurement results are compared with theoretical predictions. In the atmospheric environment, the Q factor increases when the resonance frequency increases. When reducing the pressure from 1 bar to

0.1

bar, the Q factor almost doubles. At even lower pressures, the Q factor is inversely proportional to the pressure until intrinsic effects start to dominate, resulting in a maximum Q factor of approximately 7200. Full article

(This article belongs to the Special Issue Micromechanical Flow Sensors for Microfluidic Applications)

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