Corporate Banner
Satellite Banner
Technology
Networks
Scientific Communities
 
Become a Member | Sign in
Home>News>This Article
  News
Return

Measuring Flow Using a Wobbling Tube

Published: Wednesday, January 16, 2013
Last Updated: Wednesday, January 16, 2013
Bookmark and Share
One milligram per hour: fluid flow can be measured with great precision using a tiny ‘wobbling’ tube with a diameter of only 40 micrometres.

Thanks to a new technique, the sensor, which makes use of the ‘Coriolis effect’, can be made even more compact, e.g. for medical applications. Scientists at the University of Twente’s MESA+ Institute for Nanotechnology have published an article on the subject in Applied Physics Letters.

Coriolis meters are often enormous instruments mounted in a pipeline to measure liquid flow accurately. Reduced to micrometre dimensions the result is a sensor that can measure extremely slow-moving small quantities of fluids. The fluid is passed through a tiny rectangular tube that is made to wobble. The Coriolis effect then causes the tube to move upwards as well, and this upward displacement is a measure of the amount of fluid flowing through it.

No magnets
Until now magnets have been used to bring about the wobbling motion. One of the problems was that the magnets are far bigger than the actual sensor. In the Applied Physics Letters article researcher Harmen Droogendijk introduces a new method, known as ‘parametric excitation’. Dozens of ‘electric fingers’ attached to the tube fit between identical opposing fingers mounted on supports running parallel to the tube. The extent to which these opposing sets of fingers slide between one another can be used to measure the tube's lateral displacement. But we could also use them to set the tube in motion, thought Droogendijk. He found that there is a limited area of electrical tension where the tube moves up and down much more than at a lower or higher tension, though this has to be tuned very precisely. Droogendijk carried out mathematical modelling, resulting in a new design that no longer needs magnets. More research is needed to find out whether the current lower limit of approximately 1 milligram per hour can be lowered even further.

The research was carried out in the Transducers Science and Technology group led by Prof. Gijs Krijnen, which is part of the University of Twente’s MESA+ Institute for Nanotechnology. It received financial support from NanoNed NL.

More research is needed to find out whether the current lower limit of approximately 1 milligram per hour can be lowered even further.

The Coriolis mass flow sensor is being further developed by Bronkhorst High-Tech in Ruurlo to produce a precision instrument for such things as monitoring medical IV pumps, analysing medicines using liquid chromatography, and use in microreactors and the manufacture of solar cells.


Further Information

Join For Free

Access to this exclusive content is for Technology Networks Premium members only.

Join Technology Networks Premium for free access to:

  • Exclusive articles
  • Presentations from international conferences
  • Over 3,000+ scientific posters on ePosters
  • More Than 4,500+ scientific videos on LabTube
  • 35 community eNewsletters


Sign In



Forgotten your details? Click Here
If you are not a member you can join here

*Please note: By logging into TechnologyNetworks.com you agree to accept the use of cookies. To find out more about the cookies we use and how to delete them, see our privacy policy.

Related Content

Discovery Provides New Opportunities for Chips
Scientists at the University of Twente's MESA+ research institute have developed a new manufacturing method to create three-dimensional nanostructures.
Thursday, November 19, 2015
Computerized Flexible Needles Prove Themselves in Biological Tissue
The advantage of the system is that you can avoid obstacles with the needles or critical tissues and that the system during the insertion of the needle in real time can adjust the path if, for example, the tissue deforms.
Thursday, August 27, 2015
Humanity's Overall Environmental Footprint is Not Sustainable
Substantial, fundamental changes in the world economy are required to reduce humanity's overall environmental footprint to a sustainable level.
Friday, June 06, 2014
Scientific News
Improving Natural Killer Cancer Therapy
Vanderbilt University researchers discover transcription factor critical for NK cell expansion. Findings could lead to increased therapeutic efficacy.
Molecular Mechanism For Generating Specific Antibody Responses Discovered
Study could spur more ways to treat autoimmune disease, develop accurate vaccines.
Monovar Drills Down Into Cancer Genome
Rice, MD Anderson develop program to ID mutations in single cancer cells.
It’s Now Easier To Go With The Flow
Rice University tool simplifies comparison of flow cytometry data for laboratories.
Autism and Cancer Share a Remarkable Number of Risk Genes
Researchers with the UC Davis Comprehensive Cancer Center, MIND Institute identify more than 40 common genes.
Number Of Known Genetic Risk Factors For Endometrial Cancer Doubled
An international collaboration of researchers has identified five new gene regions that increase a woman’s risk of developing endometrial cancer, one of the most common cancers to affect women, taking the number of known gene regions associated with the disease to nine.
Genetic Variant May Help Explain Why Labradors Are Prone To Obesity
A genetic variation associated with obesity and appetite in Labrador retrievers – the UK and US’s favourite dog breed – has been identified by scientists at the University of Cambridge. The finding may explain why Labrador retrievers are more likely to become obese than dogs of other breeds.
FNIH Launches Project to Evaluate Biomarkers in Cancer Patients
Company has announced that it has launched a new project to evaluate the effectiveness of liquid biopsies as biomarkers in colorectal cancer patients.
Flowering Regulation Mechanism Discovered
Monash researchers have discovered a new mechanism that enables plants to regulate their flowering in response to raised temperatures.
Turning Skin Cells into Heart, Brain Cells
In a major breakthrough, scientists at the Gladstone Institutes transformed skin cells into heart cells and brain cells using a combination of chemicals.
Scroll Up
Scroll Down
Skyscraper Banner

Skyscraper Banner
Go to LabTube
Go to eposters
 
Access to the latest scientific news
Exclusive articles
Upload and share your posters on ePosters
Latest presentations and webinars
View a library of 1,800+ scientific and medical posters
3,000+ scientific and medical posters
A library of 2,500+ scientific videos on LabTube
4,500+ scientific videos
Close
Premium CrownJOIN TECHNOLOGY NETWORKS PREMIUM FOR FREE!