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The Data Physics OCA (Optical Contact Angle) measurement device assure the most precise surface/interfacial measurements, through state-of-the-art optics, highly-precise mechanical systems, fast electronic controllers, and high speed/resolution video cameras.

The OCA measurement system provides the following functions:

• Measurement of static and dynamic contact angles on plane, convex, and concave surfaces.
• Measurement of the contact angle hysteresis.
• Calculation of the surface free energy of solids, as well as their contributions (polar/disperse) according to nine different theories.
• Representation of wetting envelopes and work of adhesion/contact angle diagrams.
• Measurement of surface and interfacial tensions, based on the analysis of the drop shape of pendant drops or lamella.
• Determination of absorption properties.
• Analysis of the real and imaginary part of the interfacial dilatational modulus based on the oscillating or relaxing contour of pendant drops.

The OCA35 consists of the basic frame onto which the following components have been added:

• X, Y, Z axis control of sample placement below the droplet formation point.
• E-MD/4 together with four electronic syringe drive units.
• Direct dosing unit for the placement of samples directly into the 'test'
• area (often used in conjunction with disposable syringes and needles).