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OCA 25

Optical Contact Angle – OCA 25

The OCA 25 is the all-purpose measuring device for contact angle measurements and drop shape analysis. The sample table of the OCA 25 is adjustable along all three directions in space via a precision axis and guided by hand wheels. The OCA 25 offers fast and exact manual positioning of the sample, even when using high-performance temperature chambers like the electrical temperature control unit TEC 700.

Analysis of even the fastest processes is possible recording up to 3250 frames/s using the 6.5-fold zoom lens and the high-performance camera with USB 3 interface. Hence, contact angles on adsorbing surfaces like tissues or powders can be measured reliably.

For dosing liquids, the manual single and double direct dosing systems (SD-DM and DD-DM can be used as well as the electronic multiple direct dosing systems DDE/x. The latter can electronically position one to four electronic syringe modules ESr-N. Additionally, a nanolitre dosing system can also be used to generate extra small liquid drops. Even these are no challenge for the OCA 25 due to its high-resolution optics.

Main Features

  • Sample table adjustable in all three axis with precision mechanics
  • High performance 6.5-fold zoom lens
  • Integrated continuous fine focus, and adjustable observation angle
  • Video measuring system with high-performance camera using USB 3 interface
  • LED-lighting with manual and software-controlled intensity including automatic temperature drift compensation


The software for the optical contact angle measuring and contour analysis systems of the OCA series is continuously being developed and enhanced with new features. Learn more about the capabilities of the OCA software


Due to the modular product design the OCA 15EC can be combined with a multitude of options of the versatile OCA accessories range. Learn more about the available accessories.

Download & Resources

OCA Brochure

For more information or to arrange a call from one of the Crea Particle Science Team, please complete the contact form. If your enquiry is urgent, please call us on 1300 552 725.

Optical Contact Angle - OCA 25








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