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Nano Biotechnology > Surface Science > Tensiometers


(Available in: Singapore, Malaysia, Thailand, Indonesia and Vietnam)

Dynamic contact angle (DCAT) measuring instruments and tensiometers

The wetting properties of common solids can be measured with electronic tensiometers, which have evolved into dynamic contact angle meters. The extensive application of internal and external computer control has provided for a high level of automation and the generation of highly reproducible results in the determination of wetting properties exhibited by powders, fibers, and fabrics as well as the thermodynamic properties of surfactant solutions.

The tensiometers from DataPhysics can be applied, with the inclusion of a range of standard accessories, to a wide range of measuring situations and sample geometries. The accessories for the DCAT modular system provide solutions suitable for the diverse needs of our users, whether for films, sheets, fibres, powders, or magnetic and fabric materials.

Typical applications:
  • Surface and interfacial tensions according to the Du Nouy ring method, with Wilhelmy plate and wire hoop method
  • Lamella breakpoint test
  • Force-based measurement of the dynamic contact angle of prismatic and cylindrical solids
  • Adsorption measurement on powders and fiber bundles according to Washburn method
  • Determination of the critical micelle formation concentration (CMC)of surfactants
  • Determination of the sedimentation rate
  • High-precision electrodynamics compensation weighing system with automatic calibration and a maximum data rate of 50 measured values per second
  • Software controlled, motor driven height positioning of the sample receptacles with variable speed
  • Automatic coupling lock for the balance
  • Integrated measurement and control electronics with connections for two Pt100 temperature sensors
  • Graphical display for weighing data, temperature and other information
  • Thermal chamber with diameter of 50,70 or 100mm with integrated magnetic stirrer and Pt100 probe
  • Non magnetic thermal chamber with a removable microelectronic stirrer system with 70mm diameter
  • Illuminated sample chamber with inert gas or vapor inlet
  • Automatic dosing and refill system (LDU)
Measuring range for contact angles0....180°; (+/-) 0.01° resolution
Measuring range for surface and interfacial tensionsDCAT11EC : 1....1000mN/m; (+/-) 0.01mN/m
DCAT11 / DCAT21 : 1....1000mN/m; (+/-) 0.001mN/m
Weighing rangeDCAT11EC : 100µg....210g
DCAT11/DCAT21 : 10µg....210g
Measuring value rangeUp to 50 weighing values per second
Travel speed of sample tableDCAT11EC : 2µm/s....60mm/min
DCAT11 / DCAT21 : 0.7µm/s....500mm/min
Programmable travel for sample tableDCAT11EC / DCAT11 : 74mm
DCAT21 : 105mm
Travel resolutionDCAT11EC : 1.0µm
DCAT11 / DCAT21 : 0.1µm
Receiver for sample vesselsOptionally 50mm, 70mm or 100mm diameter
Balance lockElectronic, software controlled (auto balance locking)
Self check and system diagnosticIntegrated
Automatic stirrer for CMC measurementMagnetic stirrer integrated in TV50/70/100; (optional non-magnetic version TV70-NM with a removable microelectronic stirrer)