Scope of Application

【Operating Instructions】

The contact angle is the angle θ between the tangent to the gas‑liquid interface at the three‑phase (gas, liquid, solid) meeting point and the solid‑liquid interface within the liquid phase. Contact angle measurement is now a primary method for surface performance characterization.The YS‑200S Research Contact Angle Meter is based on optical imaging. It uses image contour analysis to measure surface contact angle, wetting properties, surface/interfacial tension, advancing/receding angle, surface energy, etc. The instrument is equipped with an automatic liquid dispensing device. It offers high cost‑effectiveness, strong expandability, comprehensive functionality, and meets various routine measurement needs. It has been widely used in universities, research institutes, and enterprises.

**【Scope of Application】**  

The contact angle is the angle θ between the tangent to the gas‑liquid interface at the three‑phase (gas, liquid, solid) 

meeting point and the solid‑liquid interface within the liquid phase. Contact angle measurement is now a primary method

 for surface performance characterization.

The YS‑200S Research Contact Angle Meter is based on optical imaging. It uses image contour analysis to measure surface

 contact angle, wetting properties, surface/interfacial tension, advancing/receding angle, surface energy, etc. The instrument 

is equipped with an automatic liquid dispensing device. It offers high cost‑effectiveness, strong expandability, comprehensive

 functionality, and meets various routine measurement needs. It has been widely used in universities, research institutes, and enterprises.

**【Applicable Standards】**  

GB/T 24368‑2009 (Detection of hydrophobic contaminants on glass surfaces)  

SY/T 5153‑2007 (Test method for wettability of reservoir rocks)  

ASTM D 724‑99 (2003) (Test method for surface wettability of paper)  

ASTM D 5946‑2004 (Measurement of water contact angle on plastic films)  

ISO 15989 (Measurement of water contact angle on corona‑treated plastic films and sheets)

**【Product Details】**  

**Application**  

Contact angle meters are widely used in many industries. In fields such as mobile phone manufacturing, glass 

production, surface treatment, material research, chemical engineering, semiconductor manufacturing, coatings 

and inks, electronic circuits, textile fibers, medical and biological applications, contact angle measurement has

 become an important tool for surface performance evaluation.  

(Some test functions require optional accessories.)

1. Spreading, penetration, absorption, and other wetting behaviors of liquids on solid surfaces; static contact angle measurement using the sessile drop method.  

2. Advancing angle, receding angle, contact angle hysteresis, rolling angle, and dynamic contact angle measurement.  

3. Continuous real‑time study and process recording of absorbent materials; analysis of contact angle vs. time curves.  

4. Contact angle measurement for special materials such as powders, curved surfaces, and super‑hydrophobic/super‑hydrophilic samples.  

5. Contact angle measurement of materials immersed in a liquid using the captive drop method.  

6. Measurement of liquid surface/interfacial tension and polar/disperse components using the pendant drop method.  

7. Calculation of solid surface free energy and its polar/disperse component analysis.  

8. Analysis of adhesion work of liquid on solid surface; evaluation of solid surface uniformity, cleanliness, etc.

**Accord with National Standards**  

(As listed above)

  Principle 

As shown in the diagram, the contact angle meter mainly consists of a light source, an injection unit, a sample 

stage, an image acquisition system, and analysis software. The principle is optical imaging.  

- Light source: dense LED cold light design, uniform illumination, clear image, long life.  

- Injection unit: high‑precision syringe pump, software‑controlled quantitative speed, stable droplet delivery, accuracy up to 0.01 μL.  

- Sample stage: three‑dimensional manual precision platform, flexible operation, accurate positioning, customisable size.  

- Acquisition system: black‑and‑white imported CCD camera, stable shooting, clear and reliable images; lens: 

German industrial grade, 0.7‑4.5× magnification adjustable, no distortion.  

- Analysis software: powerful, one‑key fully automatic fitting, using the world’s leading fitting methods to precisely fit various droplet shapes.

Product features

1. Main body: high‑strength aviation aluminum, modular design, self‑developed integrated chip circuit control,

 incorporating the best design and configuration of internationally leading instruments, ensuring high stability.  

2. Industrial‑grade dense adjustable LED cold light source (lifespan > 25,000 hours), ensuring clear imaging while avoiding droplet evaporation caused by extra heat.  

3. High‑performance Japanese original industrial core, industrial telecentric zoom lens, virtually distortion‑free images, optimal imaging.  

4. USB 2.0 standard interface for fast data transmission, high compatibility, strong imaging stability.  

5. First in China to provide German‑imported calibration standards for contact angle; angle calibration plates: 3°, 5°, 8°; 60°, 90°, 120°; 115° (optional).  

6. Flexible acquisition system suitable for most measurement environments, capable of handling various complex sample surfaces.  

7. World‑leading contact angle analysis methods, including unique differential ellipse and differential circle methods for special liquid imaging fitting.  

8. Internationally advanced calculation methods; fully automatic fitting avoids manual errors.  

9. Bilateral contact angle fast fitting function for comprehensive analysis of wetting and accurate assessment of actual wetting conditions.  

10. Dynamic recording, video fast data measurement; continuous recording of contact angle changes with automatic batch fitting.  

11. Automatic report generation in Word, Excel, graph formats, etc.  

12. Advancing and receding angle measurement for efficient evaluation of sample surface stability.  

13. Multiple optional accessories; robust R&D team can meet custom measurement requirements.

Optional Accessories

Tech Parameter