How a contact angle measuring instrument works:

The syringe needle drops a drop of the liquid to be measured on the substrate, the drop will adhere to the surface of the substrate and cast a shadow, and the projection screen uses optical magnification to project the image onto the screen for measurement; through the principle of optical projection imaging, the Fidelity acquisition and precise analysis of gas, liquid and solid three-phase interface profiles.

Contact angle measuring instrument components:

The contact angle measuring instrument consists of a video acquisition system, an injection system, a control system, a three-axis moving sample platform and analysis software, as shown in the figure below.

（Parts of Sindin Precision Contact Angle Measuring Instrument Display Diagram）

Contact angle measuring instruments can meet any of the following measurement needs:

*Surface wetting properties
* table/interfacial tension
*Water contact angle
*Surface free energy
* work of adhesion
*Adsorption performance, etc.