Recent Developments
Based on our Patent "Method and Device for Measuring the
Characteristics of an Oscillating System" we developed a number of prototypes of
sensors for applications in the field of viscometry.
Dynamic Viscometry [PDF]
On-line
Process Viscometers
> Dip-in Process Viscometer:
AST100[pdf]
www.brookfieldengineering.com
This viscometer is based on a design developed at the Center of Mechanics. It
produced and marketed under a license agreement Brookfield Engineering
Laboratories, U.S.A. It is dip-in or rod-type sensor for in-line viscosity
measurement used in the printing and food industries.
> In-line Tube Viscometers:
Tube probes [PDF]
A range of in-line tube probes with a diameter of the
measurement ranging from 30 mm down to 0.4 mm.
Prototypes of the large diameter tube have been
tested in pilot plants of Nestle and Danone.
l
Contact:
haeusler@imes.mavt.ethz.ch
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Blood
Viscosity Probes
> Tube-type Blood Probe:
Tube Blood Viscometer [PDF]
A first series of in-vitro and in vivo-tests were performed
with a tube probe with a sample volume of 1.5 ccm. after setting the
syringe the probe with the vacutainer tube placed at its downstream end was
introduced into the syringe holder. Immediately after filling the probe the
viscosity is measured. .
The results of the first series of clinical blood viscosity
measurements are published in Cinical Hemorheology and
Microcircualtion, 18 (1998)
[PDF]
> Disposable Blood probe:
Disposable BVM [PDF]
A second series of clinical tests were performed with a low
cost disposable blood viscosity probe consisting of a simple spring-mass
torsional resonator which is integrated into a evacuated tube (type Vacutainer
or Venosafe). After placing the syringe into the vein the probe is introduced
into the syringe holder for filling after which it is placed into the control
unit for the viscosity measurement. The results of this investigation of various
physiological factors influencing the viscosity of human blood are published
in
Biorheology, 43 (2006)
[PDF]
Contact:
haeusler@imes.mavt.ethz.ch
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Microliter
Viscometer for Biomedical Applications
For many applications, as for certain biological fluids, the sample volume available for a viscosity measurement
has to be of the order of 10 Microliter or less. The main advantages of our device: fast response (order of
seconds), easy to use, robust, disposable or easy to clean depending on design.
> DNA analysis:
Tube Microliter
Viscosity Probe I [PDF]
A 0.5 mm diameter tube with very high sensitivity is
used to measure the viscosity versus DNA concentration characteristic of
solutions.
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> Baby Blood Viscometer:
6 Microliter VM [PDF]
In order to be able to measure the viscosity of the
blood of new born Babies a special microliter viscometer was designed and tested
clinically. The results will be published in Clinical Hemorheology and
Microcirculation
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> Biological Fluids: Sperm, Cervical Mucus, Bile,
Synovial fluid:
20 Mikroliter VM
[PDF]
Clinical tests with this type of probe are presently
being performed for the measurement of the viscosity of sperm and cervical
mucus.
Contact:
haeusler@imes.mavt.ethz.ch
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