The Dropometer is a portable smartphone based contact angle goniometer, capable of measuring:
- Surface tension of a liquid
- Contact angle of a droplet (static, advancing or receding)
- Sliding angle of a droplet on a tilted surface
- Surface free energy of a solid surface
Utilizing a smartphone, LED backlighting, and a simple syringe holder, accurate contact angles can be measured in the field, as well as in laboratories. There are two versions of the Dropometer, Manual and Automatic. The automatic version has a smart liquid drop generation system which can precisely generate a liquid drop with a set volume at different flow rates. There is also an optional smart tilted stage which can tilt the sample surface according to the user needs by setting the tilting rate and angle. A customized version is also available if you need to control certain parameters (e.g. temperature or pressure).