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SensaDyne Instrument Division manufactures the world's most advanced
computer-based instruments for intermittent and continuous measurement of
dynamic and static (equilibrium) fluid surface tension. The company was
formed and incorporated in 1981 in Madison, Wisconsin, by Victor P.
Janule, the current President and CEO.
SensaDyne has developed and commercialized a number of fluid surface
tension measurement instruments, for both laboratory and in-process
applications, based on the maximum differential bubble pressure method.
This method evolved from research done in cooperation with the University
of Wisconsin, Department of Chemical Engineering. In July 1982, the
company relocated to Milwaukee, Wisconsin and then in 1992 to new and expanded
facilities in Mesa, Arizona.
SensaDyne markets its instruments throughout the world, either directly
from its sales office in Mesa, Arizona, or through a network of domestic
and worldwide representatives. Technical support is available by
contacting its Mesa, Arizona office at sensadyn@ix.netcom.com.
Technology
While there are several classical methods for measuring surface tension,
the patented maximum differential bubble method used by SensaDyne is both
simple and unique.
Bubbles are formed at the ends of two or more tubes with different sized
orifices, immersed in a fluid. The difference in the maximum bubble
pressure required to generate the bubbles is directly proportional to
fluid surface tension. By using more than one orifice, the method is
independent of depth of immersion. It is immune to surface
contamination or surface foam. Because bubbles are formed continuously,
this method allows in-process monitoring and control.
SensaDyne Instruments continues to be at the forefront of surface tension technology.
Dynamic Surface Tension Development
Chronology SensaDyne Instrument Division
1981
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Developed and patented the world's first commercially available Dynamic Surface Tensiometer based on the bubble technique, the SensaDyne 5000. |
1986
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Developed the first computer-interfaced bubble Tensiometer, the SensaDyne PC6000. |
1992
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Developed the first bubble Tensiometer with all internal hardware components in corrosion resistant 316 stainless steel, the SensaDyne PC6000-SS. |
1992
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Developed the first bubble Tensiometer with process control capability, the SensaDyne PC6000-PC. |
1994
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Developed the first bubble Tensiometer with individual Mass Flow Controllers for each orifice to allow higher bubble rates and accurate Surface Age Measurements in the low millisecond range. |
1994
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Developed the first software peak detection algorithms for accurate surface tension measurements in viscous fluids. |
1995
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Developed the world's least expensive line of Dynamic Surface Tensiometers, theSensaDyne QC3000 and QC6000. |
1996
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Developed the SensaDyne STS, the first automatic additive/surfactant dispensing system for use with SensaDyne Tensiometers for automatic concentration and dynamic CMC curve generation. |
1996
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Developed and installed the world's first in-reactor surface tension measuring system for emulsion polymerization, the SensaDyne PC1000R. |
1996
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Developed the world's first fully automatic bubble Tensiometer with automatic viscosity compensation, the SensaDyne PC500-LV. |
1998
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Developed the first dedicated on-line, stand-alone, bubble Tensiometer with embedded computer system and process control options, the SensaDyne IP6000. |
1999
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Developed fully compatible Windows software for all models of computer-interfaced SensaDyne Tensiometers. |
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ASTM Test Method
SensaDyne tensiometers are the only commercially available instruments that
comply with ASTM Designation: D 3825-90 Test Method
for Dynamic Surface Tension by the Fast-Bubble Technique.
For more information contact ASTM Web.
Patents
SensaDyne technology is covered by the United States patents No.
4,416,148, as well as several new patent applications.
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