The Optical contact angle measuring-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 precision axes with hand wheels. Hence, a fast and exact manual positioning of the sample is always guaranteed, even when using high-performance temperature chambers like the electrical temperature control unit TEC 700U. Analysis of even the fastest processes is possible recording up to 4276 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 system DDE/x. The latter are able to electronically position one to four electronic syringe modules ESr-N.
Furthermore, a nanolitre dosing system can be used to generate extra small liquid drops. Even these are no challenge for the OCA 25 due to its high resolution optics.
Features of Optical contact angle measuring- OCA 25
- 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
Technical Specification
| Contact angle | ○ |
| measuring range | 0 … 180° |
| accuracy | ± 0.1° |
| resolution | ± 0.01° |
| Surface and interfacial tension | ○ |
| measuring range | 0.01 … 2000 mN/m |
| resolution | ± 0.01 mN/m |
| Surface energy | ○ |
| Liquid bridge analysis | ○ |
| Oscillation / relaxation | ○ |
| Topview contact angle | ○ |
| Sample table | manual precision axes |
| traversing range (X-axis [mm] x Y-axis [mm] x Z-axis [mm]) | 100 x 104 x 42 |
| traversing speed (X-axis) | ― |
| traversing speed (Y-axis) | ― |
| traversing speed (Z-axis) | ― |
| positioning resolution | ― |
| max. sample weight | 3.0 kg (locked Z-axis: 15.0 kg) |
| LED-lighting with manual and software-controlled intensity including automatic temperature drift compensation | |
| warm-white LED (3000 K) | ● |
| monochromatic red LED (660 nm) | ○ |
| monochromatic blue LED (465 nm) | ○ |
| Temperature and environmental control | |
| temperature chambers (-30 °C to 700 °C) | ○ |
| electrical needle heating device (RT … 700 °C) | ○ |
| humidity generator of the HGC series | ○ |
| Optics | |
| 6.5-fold zoom lens with integrated manual focus (± 6 mm) | ● |
| 10-fold zoom lens with software-controlled focus (± 4,5 mm) and observation angle (-9° … +2°2‘) | ― |
| field of view (X min x Y min) … (X max x Y max) | |
| (1.11 mm x 0.83 mm) … (7.14 mm x 5.35 mm) | ― |
| (2.50 mm x 1.33 mm) … (16.09 mm x 8.55 mm) | ● |
| (1.12 mm x 0.58 mm) … (11.29 mm x 5.98 mm) | ― |
| Camera system | |
| USB 3 camera, 1/3″ sensor
max. resolution 1440 x 1080 pixel with 227 frames/s, max. frame rate 3246 frames/s |
― |
| USB 3 camera, 2/3″ sensor
max. resolution 2048 x 1088 pixel with 170 frames/s, max. frame rate 4276 frames/s |
● |
| high-speed camera system | on request |
| TP 50 control panel | ○ |
| Dimensions (L [mm] x W [mm] x H [mm]) | 660 x 220 x 365 |
| Weight | 16 kg |
| Power supply | 100 … 240 VAC;
50 … 60 Hz; 70 W |
- integrated ○with optional software/accessory ― not available
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