Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Measuring flow using a tiny wobbling tube

The Coriolis mass flow sensor. The tube is the U-shaped tiny line. In the left lower corner, the electric fingers are visible for measuring the displacement of the tube and activating movement
The Coriolis mass flow sensor. The tube is the U-shaped tiny line. In the left lower corner, the electric fingers are visible for measuring the displacement of the tube and activating movement

Abstract:
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.

Measuring flow using a tiny wobbling tube

Enschede, Netherlands | Posted on December 18th, 2012

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

Industrial applications

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.

Full bibliographic information

The article, ´Parametric excitation of a micro Coriolis mass flow sensor´, by Harmen Droogendijk, Jarno Groenesteijn, Jeroen Haneveld (Micronit Microfluidics), Remco Sanders, Remco Wiegerink, Theo Lammerink, Joost Lötters (Bronkhorst High-Tech) and Gijs Krijnen, has been published in Applied Physics Letters. It is available on request.

####

For more information, please click here

Contacts:
Wiebe van der Veen
+31612185692


P.O. Box 217
7500 AE Enschede, Netherlands
053-489 9111
053-489 2000

Copyright © AlphaGalileo

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

First Observation of Electronic Structure in Ag-Rh Alloy Nanoparticles Having Hydrogen Absorbing: Storage Property –Attempting to solve the mystery of why Ag-Rh alloy nanoparticles have a similar property to Pd– October 30th, 2014

Iranians Present Model to Predict Photocatalytic Process in Removal of Pollutants October 30th, 2014

Production of Biocompatible Polymers in Iran October 30th, 2014

Amorphous Coordination Polymer Particles as alternative to classical nanoplatforms for nanomedicine October 30th, 2014

Nanomedicine

Production of Biocompatible Polymers in Iran October 30th, 2014

Amorphous Coordination Polymer Particles as alternative to classical nanoplatforms for nanomedicine October 30th, 2014

'Electronic skin' could improve early breast cancer detection October 29th, 2014

Tiny carbon nanotube pores make big impact October 29th, 2014

Announcements

First Observation of Electronic Structure in Ag-Rh Alloy Nanoparticles Having Hydrogen Absorbing: Storage Property –Attempting to solve the mystery of why Ag-Rh alloy nanoparticles have a similar property to Pd– October 30th, 2014

Iranians Present Model to Predict Photocatalytic Process in Removal of Pollutants October 30th, 2014

Production of Biocompatible Polymers in Iran October 30th, 2014

Amorphous Coordination Polymer Particles as alternative to classical nanoplatforms for nanomedicine October 30th, 2014

Tools

A new cheap and efficient method to improve SERS, an ultra-sensitive chemical detection technique October 28th, 2014

New Compact SIMS at 61st AVS | Visit us on Booth 311 October 28th, 2014

New nanodevice to improve cancer treatment monitoring October 27th, 2014

Haydale Secures Exclusive Development and Supply Agreement with Tantec A/S: New reactors to be built and commissioned by Tantec A/S represent another step forward towards the commercialisation of graphene October 24th, 2014

Energy

Iranians Present Model to Predict Photocatalytic Process in Removal of Pollutants October 30th, 2014

New solar power material converts 90 percent of captured light into heat: SunShot Project aims to make solar cost competitive October 29th, 2014

New Compact SIMS at 61st AVS | Visit us on Booth 311 October 28th, 2014

New evidence for an exotic, predicted superconducting state October 27th, 2014

Solar/Photovoltaic

New solar power material converts 90 percent of captured light into heat: SunShot Project aims to make solar cost competitive October 29th, 2014

Advancing thin film research with nanostructured AZO: Innovnano’s unique and cost-effective AZO sputtering targets for the production of transparent conducting oxides October 23rd, 2014

Magnetic mirrors enable new technologies by reflecting light in uncanny ways October 16th, 2014

Dyesol Signs Letter of Intent with Tata Steel October 13th, 2014

NanoNews-Digest
The latest news from around the world, FREE





  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More














ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE