Solid materials like metals and glasses generally have large surface free energy (the Υ_s should be large) and water droplets on those materials should form a small contact angle. On the other hand, when the solid surface is contaminated with organic materials, water droplet will form a larger contact angle. The contact angle is sensitive enough to show different results even with a small amount of contamination such as mono-layer orders. That’s why contact angle is used for evaluating cleanness of solid surface.

The followings are other advantages for which Contact Angle data is widely used:

1. You can measure it without special knowledge about its complex theories like the Young equation.
2. Skilled operations or procedures are not required for measurement. These days, contact angle meters are often coupled with computers to make operation easier.

Brief Specifications

• Measure system : CCD camera
• Measure method : Sessile drop, Extension/Contraction (Static)
• Analysis method : θ/2 method, tangent method, curve fitting (ellipse, circle)
• Measure range : 0° ~ 180°
• Resolution : 0.1°
• Accuracy : 0.5° (Repeatability described in standard deviation)
• Lens system : Fixed Focus
• Max sample size : 100mm × 100mm × 10^Tmm, 300g
• Stage operation : Manual, X Axis - 100mm
• Z-axis operation : Stage:12.5mm
• Dimensions : 194^W×380^D×235^Hmm
• Weight : 3.1 kg
• Electric power : 100∼240V AC