Goniometer

Model: 
Contact Angle System OCA 20, Dataphysics
Purchase year: 
2002
Features: 

The main features of the OCA 20 are the following ones:

- CCD video camera with a resolution of 768x576 pixel and up to 50 images per second.
- Integrated temperature measurement and display in the range from -40 ºC to 150 ºC.
- Up to four manual and/or electronic (motor driven and software controlled) dosing units with a manual or electronic multiple dosing system or alternatively one direct dosing unit with one manual or electronic syringe unit.
- Micro-controller module for control of the electronic syringe units, the electronic multiple dosing system, the electrically driven sample stages as well as the temperature controller.
- An electronically controlled tilting base to measure the sliding angle in different surfaces.

The software SCA 20 offers various expansion steps:

- Control the electronic syringe modules, the tilting base assemblies, wafer stages and temperature controlled devices.
- Static and dynamic contact angle measurement according to the Sessile and Captive Drop method.
- Calculation of the surface and interfacial tension from the contours of pendant and sessile drops as well as of liquid lamellas on plates, rods and threats.
- Calculation of the surface free energy of solids and their components according to the theories of Wu, Zisman, Owens-Wendt, Extended Fowkes, Schultz 1+2, Fowkes and van Oss & Good.