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.

*NEW* Theta Pulsating Drop
Uses pulsating drop method & best for interfacial rheology measurements

*NEW* Theta Pico
Contact angle meter that measures the wettability on small areas effectively

*NEW* Theta Flow
Better, improved that measures static & dynamic contact angles with touch display & environmental monitoring

Theta Flex
Better, improved that measures static & dynamic contact angles

Theta Lite
Simple, compacted, user-friendly, precise

Theta High Pressure
Measuring contact angles, wettability under pressure & temperature

Theta Topography
Measures roughness corrected contact angle