The tilting device PA4020 is our special unit for the flexible analysis of inclined surfaces with the DSA25. The tilt which leads to the drop running off as well as the advancing and receding contact angle of the moving drop lead to conclusions concerning roughness and adhesion of the sample.
Furthermore, the roll-off angle is informative for ultrahydrophobic samples and is accurately measured with slow tilt movements. To determine this parameter precisely, our ADVANCE software detects the coordinates of the three-phase points, which indicate the position of the drop in the camera image. The change in these coordinates can be measured accurately, yielding an objective criterion for detecting the roll-off angle.
As the whole instrument is tilted, the surface is always in the same position relative to the lens. This makes the video evaluation very easy, and changes in the drop can also be tracked visually. Almost all other measuring methods and options provided by your instrument can be used without changing the setup. The tilting movement and related measurements can be embedded in automatic measuring sequences.
- Angle of inclination up to 90° with a resolution of 0.1°
- Tilt speed from 0.1°/s to 4.5°/s