Commonly used by surface scientist to measure surface and interfacial tension, optical tensiometers uses the pendant or sessile drop methods. A drop is produced and captured using a CCD Camera, the drop profile is extracted and the software integrates the profile and fit it in the Young-Laplace equation. Surface tension can then be calculated from the fitted parameters.
The Theta series encompasses the different needs and specific requirements when measuring surface tension & interfacial tension.
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