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DCAT
21
Dynamic
Contact Angle Meter and Tensiometer
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Description:
The DCAT 21 is used for the software-controlled measurement of
- the contact
angle of powders and fiber bundles and the adsorption
behavior of liquids on wettable materials according to the
modified Washburn method
- the dynamic
contact angle and the surface energy of prismatic and
cylindrical samples according to the Wilhelmy method
- the static
surface and interfacial tension of liquids
- the critical
micelle formation concentration of surfactants (CMC)
according to the Wilhelmy Plate method, Lenard Frame method
or the Du Noüy Ring method with automatic ring
correction according to Huh & Mason, Zuidema &
Waters and Harkins & Jordan
as well as for
fully automated reproducibility measurements.
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Equipment:
The DCAT 21 consists of
the basic instrument with the following technical features:
- High-precision
electrodynamically compensated weighing system with automatic
calibrating function
- Software-controlled
motorized height positioning of the sample vessel with variable
speed
- Integrated measuring
and control electronics with digital thermometer
- Graphical display for
weighing data, temperature and other measuring statuses
- Serial RS 232C
interface with PC connecting cable
- Illuminated sample
chamber with connection for inert gas
- Sample vessels of
borosilicate glass available with diameters 50,70,100 mm
- Pt100 temperature
sensor for the installation in the temperature control unit
- Du Noüy ring RG
11, made of platinum-iridium to DIN 53914
- Wilhelmy plate PT 11,
made of platinum-iridium to DIN 53914
It is prepared for the
installation of a liquid temperature control unit with integrated
magnetic stirrer for mounting either of the sample vessels TV 50 / TV 70
/ TV 100.
Technical Data:
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Measuring
Range |
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1 …
1000 mN/m; ± 0.001 mN/m |
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Measuring
Rate |
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25
weighing data/s (optionally 50 weighing data/s) |
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Weighing
Range |
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0,1 mg …
210 g; ± 0,01 mg |
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Liftng
Speed |
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0,7
µm/s …
500 mm/min |
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Position
Resolution |
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0,1
µm |
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Maximum
lifting range |
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105 mm |
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Temperature
range |
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-10°
… 130° C |
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Temperature
measurement |
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2 Pt100
input channels with -60 … 450°C (Pt100 optional), 0.1 K
resolution; 1/3 DIN IEC 751 (± 0.03 %), class B |
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Measuring
methods |
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Modified Washburn
method
Dynamic Wilhelmy method
Wilhelmy Plate method
Lenard Frame method
Du Noüy Ring method
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Receptacle
for sample vessel |
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50 mm diameter
(optionally 70 mm and 100 mm)
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Size
of instrument (L x W x H) |
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305 x 230 x 575 mm
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Weight |
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25 kg
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Power
supply |
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90 … 264 VAC;
43 … 60 Hz; 55 VA
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Alternative/Supplementary
units and accessories |
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Liquid
temperature control units (-10 …130°C); sample vessels;
cylindrical and Wilhelmy plates; PTFE-sample bodies; Du Noüy
rings; precision dosing system; software SCAT; complete PC-systems |
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