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DCA-100 Contact Angle Tensiometer

Force Balance Tensiometer

This new modular tensiometer brings choices in sensitivity and sample handling accessories. All at very economical prices: laboratory quality tensiometers at less than $20,000.

DCA-100 Tensiometer
DCA-100 Contact Angle Tensiometer

Sensitivity

Two sensitivity ranges are offered: 1 microgram resolution and 100 micrograms. The 1 microgram unit is more expensive but provides the sensitivity necessary to measure contact angles on fibers. Fibers are difficult because they have a small wetted periphery -- hence the developed forces are small. Click here for a discussion of resolution, the relationship between micrograms and newtons force, and fiber measurements. The 100 microgram resolution balance is completely suitable for Du Nouy and Wilhelm plate surface tension measurements and Wilhelmy plate contact angle immersion measurements on centimeter-size samples. In all these cases the wetted periphery is measured in tens of millimeters rather than tens of microns.

DCA-100 Closeup
Contact angle measurement on centimeter size sample

Software

The tensiometer is controlled from a PC over either an RS232 or USB interface. Meets applicable ASTM, DIN and ISO standards for surface tension and contact angle measurements. The following measurement modes are provided:

  • Du Nouy ring surface or interfacial tension
  • Wilhelmy plate surface tension
  • Rod method surface tension
  • Density (weighing of known volume)
  • CMC (external titrator)
  • Wilhelmy plate advancing/receding contact angles
  • Fiber contact angles (1ug DCA-100F only)
  • Surface energy calculations (from contact angles)
  • Modified Washburn method of powder contact angle
  • Adsorption
  • Penetration
  • Sedimentation

Application Areas

  • Detergency: developing new surfactants and formulations
  • Inks/Paints/Coatings: wetting and adhesion on solid surfaces
  • Polymers/Composites/Adhesives: surface energies
  • Pharmaceuticals: dissolution and adsorption rates of powders
  • Cosmetics: skin care product development
  • Textiles and Fibers: textile coatings and single fiber wetting
  • Food and Beverages: evaluation of emulsions and proteins
  • Petrochemicals: determine effects of additives or impurities on surface tension
  • Paper: adsorption rates and characterization of coatings
  • Biotechnology: surface activity and wettability through contact angles

Specifications

Parameter DCA-100S
(surface tension)
DCA-100F
(fiber capable)

Surface and interfacial tension
.....Range
.....Resolution


0-999mN/m
0.01mN/m


0-999mN/m
0.0001mN/m

Stage Positioninng
.....Range
.....Resolution
.....Speed


80mm
1um
0.001 - 4mm/s


80mm
1um
0.001 - 4mm/s

Balance (Weighing Range)
.....Range
.....Resolution
.....Calibration


80g
100ug
automatic


210g
1ug
automatic

Temperature Control
.....Range
.....Resolution
.....Temperature Probe


-10 to 130C
0.1C
Pt100 RTD


-10 to 130C
0.1C
Pt100 RTD

Sample Vessel
.....Size
.....Integrated Stirrer


40, 50, 70mm
No (option)


40, 50, 70mm
Standard

Size
.....Length x Width x Height
.....
.....Weight
.....


300x300x500mm
12x12x20 inches
15kg
33lbs


300x300x500mm
12x12x20 inches
15kg
33lbs