Video-based high-speed contact angle measuring device

High-speed contact angle measuring device for the determination of fast sorption and spreading with up to 360 images per second. Particularly to measure fast adsorption and absorption processes on paper, textiles, membranes, filter cloth and porous solids.

For the software-controlled measurement and analysis of

• Static and dynamic contact angle according to the Sessile and Captive Drop method
• Analysis of the drop shape according to the Pendant Drop method
• Wetting behavior on solid surfaces
• Surface free energy of solids and their components
• Surface and interfacial tension out of the analysis of the drop shape

The OCAH 200 consists of the basic instrument with the following technical equipment:

• Dosing bay for installation of the optional manual syringe units and single or multiple (max. 4) needle support with a vertical and horizontal fine adjustment

• Measuring stage, adjustable in three axis for accurate sample positioning

• Lens mount with adjustable tilt

• High-performance six-fold power zoom lens with an integrated continuous fine focus

• High-speed video system with adapter and CCD-camera

• High-performance video digitizing board (frame grabber) for the PC

• Halogen lighting with continuously adjustable intensity without hystereses for a homogeneous back lighting

• Control and measuring electronics with built-in digital temperature display and serial RS 232C interface

• Power supply with automatic voltage adjustment

Absorption kinetics study

The 32-bit NT based software SCA 200 developed for Windows 2000/XP offers by various expansion steps.  The analyses according to different methods were build-in the software.