Professional level optical droplet angle measuring instrument and interfacial tension meter

Professional level optical droplet angle measuring instrument and interfacial tension meterSL200KS is an automatic interface chemical measurement system based on image analysis method, suitable for precise testing of contact angle and interface tension values. This device combines long-term research and development experience, adopts a modular design concept, supports diversified configuration combinations, and meets the high-precision requirements of different experimental scenarios.

Professional level optical droplet angle measuring instrument and interfacial tension meterSL200KS core functions and configurations:

• Modular design: Provides multiple component matching solutions to adapt to different testing scenarios (such as dynamic/static contact angle, liquid gas/liquid liquid interface tension, etc.).

• High precision testing capability:

  • Contact angle analysis: supports dynamic and static contact angle measurement, including rolling angle and forward/backward angle values.

  • Surface free energy analysis: Calculate the surface free energy of solids and its components (dispersion force, polarity force, hydrogen bonding force).

  • Interface tension testing: using the hanging drop method to measure the interfacial tension values between liquid and gas/liquid and liquid.

  • Liquid viscoelasticity index: Analyzing interfacial rheological properties through oscillation drop technique.

• Professional hardware system:

  • Precision optical structure: Industrial grade optical imaging systems ensure imaging clarity.

  • Precision titration system: supports high-precision droplet control and is suitable for complex sample testing.

• Intelligent software support: CAST ™ The 2.0 analysis software provides automated data processing capabilities, supporting dynamic curve fitting, database management, and data export.

Application Scenario:

• Materials Science: Wettability assessment of coatings, films, fibers, and other materials.

• Industrial quality control: Interface performance testing of surfactants, inks, coatings, and other products.

• Research experiment: Study of interfacial chemical behavior under high temperature or dynamic conditions.

The SL200K series contact angle meter provides a flexible and reliable solution for interface chemistry research through modular design and high-precision testing capabilities, helping to efficiently promote research and quality control work.

Definition of contact angle

The angle formed when a small liquid droplet is dropped on a solid horizontal plane and the liquid phase is sandwiched between the gas-liquid interface and the solid-liquid interface at the solid liquid gas three-phase boundary point on the surface of the solid is called the contact angle.

Application Scope Table

Compliance with standard table

The SL200K series contact angle meter is based on optical contact angle measurement technology and optimized design with long-term research and development experience, aiming to balance performance and cost control. By comprehensively optimizing the mechanical structure, optical system, and software functions, the equipment performs excellently in terms of imaging clarity and operational stability.

Core technical features

1. Precision control system

• Cross linear guide rail technology: manual control accuracy up to 0.01mm, software control accuracy up to 0.5 μ m.

• Multi dimensional mechanical structure design: Provides 10 dimensional control (2XYZ+rotation+3 horizontal adjustment) to coordinate the operation of the sample stage, camera, and injection system.

• High precision infusion pump system: droplet control accuracy can reach 0.02 μ L (expandable to nL level), supporting repeated positioning injection.

• Micro distance needle focusing system: suitable for droplet transfer operation of superhydrophobic materials, improving testing convenience.

• Integrated body design: Made of aviation aluminum material, balancing portability and structural strength.

2. Specialized mechanical structure design

• Fixed focal length mechanical structure: Combined with a precision adjustment frame, it is easy to quickly focus and capture clear images.

• Integrated rolling platform: The sample and lens rotate synchronously to ensure the stability of the observation center and support roll off angle analysis.

• Removable injection system: compatible with fine needle tubes, PTFE needle tubes, etc., suitable for testing samples of different viscosities.

• Multidimensional horizontal adjustment: Provides 4 horizontal adjustment functions and supports leveling of two-dimensional sample tables.

• Design of shading film: Optimize the uniformity of background light and improve imaging effect.

3. High speed optical imaging system

• Adjustable LED cold light source: adjustable brightness to avoid interference from droplet evaporation and ensure clear contours.

• High speed camera system:

  • Standard configuration: 87 frames per second camera (WVGA format), optional 130M, 300M, 500M resolution cameras.

  • Supports AOI technology high-speed cameras (100-1000 frames per second) and GigE cameras for more stable transmission.

• Industrial continuous magnifying lens: Magnification ratio of 0.35-4.5X, suitable for analyzing samples of different sizes.

• USB 2.0 interface: compatible with laptops and new desktop computers, simplifying the connection process.

4. Intelligent analysis software CAST ® two

• Droplet morphology analysis: supports 6 forms including stop droplet (2/3 state), suspended droplet, bubble capture method, insertion plate method, oscillation droplet method, etc.

• Contact angle calculation method: Provides 7 algorithms including θ/2 method, circle fitting method, ellipse fitting method, and 20 curve fitting techniques, supporting dynamic/static analysis.

• Surface free energy estimation model: includes 12 models (such as Equation of State, Acid base method) to analyze the surface characteristics of low-energy/high-energy solids.

• Surface correction technology: suitable for contact angle analysis of concave or convex surfaces, improving measurement accuracy.

• Database management:

  • Real time data saving and indexing, supporting historical data queries, modifications, and backups.

  • The measurement data can be exported as Excel documents and BMP images for easy writing of scientific research reports.

• Fully automated function:

  • One click completion of image capture, contact angle calculation, data saving, and real-time display.

  • Double click the manual correction function to retain the adjustment record and ensure data reliability.

• Compatibility design: Standardized video working mode, supporting multi brand contact angle tester host system upgrades.

5. Extended functions

• Interface tension testing: Based on Young Laplace equation fitting, supporting liquid gas/liquid-liquid system analysis.

• Wettability Envelope Diagram (WBA) ®）： Analyze the surface energy distribution and wetting characteristics of liquids.

• Dynamic contact angle analysis: supports zero time point measurement of complex samples such as powders, fibers, and absorbent materials.

• Video recording function: Record the measurement process in AVI format for subsequent analysis.

meet the standard

• ASTM D 724: Surface Wettability Test for Paper (Contact Angle Method).

• ASTM D 5946-2004: Measurement of water contact angle of polymer films treated with corona discharge.

• ISO 15989: Measurement of contact angle between plastic film and water (corona treatment).

Application field

• Materials Science: Surface Free Energy Analysis, Wettability Evaluation.

• Industrial quality control: Performance testing of coatings, inks, and surfactants.

• Biopharmaceuticals: research on the wettability of artificial bones and drug carriers.

• Energy and Environmental Protection: Wetting Analysis of Rock Cores, Interface Study of Fiber Composite Materials.

• Electronic manufacturing: PCB and wafer surface cleanliness testing.

The SL200K series contact angle meter provides an efficient and reliable solution for interface chemistry research through precision mechanical design, high-speed imaging system, and intelligent analysis software.

1. Technical parameters

The main differences between each model are marked with "*" below.

2. Attachment:

1. Temperature control device:

Including (1) sample temperature control and (2) testing liquid temperature control;

These are two temperature control systems that respectively control the temperature of liquid and solid samples. It can be purchased separately or simultaneously.

The temperature control method for solid samples can be selected from one of the following two temperature control methods:

(1) Thermostatic water bath control: 0-95 ℃, temperature error within 0.1 ℃;

(2) Semiconductor heating and cooling: 5-85 ℃, temperature error within 0.5 ℃;

(3) Special temperature heating system: temperature control requirements such as 200 ℃ and 400 ℃ can be confirmed with us.

It is recommended to use a constant temperature water bath for liquid temperature control.

2. High temperature contact angle test: achieve maximum contact angle tests of 1400, 1700, 1800, and 2000 degrees; Customized products require a deposit.

3. Vacuum environment device: to achieve contact angle testing under vacuum or different gas environments; Customized products require a deposit.

4. Sample slot: effectively control the shaking of the sample and the influence of temperature, light, etc; Customized products require a deposit.

5. High temperature interfacial tension test: The interfacial tension test between melted solid materials and air is conducted using hanging drop or stopping drop interfacial tension analysis techniques. Customized products require a deposit.

6. Full range of needle tubes and needles

Including: 25uL, 100uL, 500uL, 1000uL high-precision microinjectors, as well as PTFE needles, stainless steel needles (various diameters), plastic needles, bent needles, etc

7. High precision dual channel software controlled automatic injection pump

8. Special fixtures: used for clamping fibers, films, paper, etc

9. Quartz glass sample tank for bubble capture method

10. Oscillating Drop Test Module

(1) By using high-frequency oscillators and closed-loop oscillation control systems, the control accuracy is higher and the control method is more flexible. Oscillators with different oscillation frequencies and amplitudes can be selected according to customer needs.

(2) The injection needle tube can be selected from 0.5uL, 1uL, 5uL, 15uL, 100uL, 500uL, 1000uL, etc.

(3) Oscillatory waveforms include positive arc waves, residual arc waves, triangular waves, linear waves, sawtooth waves, etc., with frequencies within 2KHz that do not attenuate or distort.

Example of Test Results for CAST 2.0 Image Analysis System

1. Analysis of Forward and Backward Angle Real Image:

Figure 1 Analysis method: Curve ruler fitting method (circle fitting, spline fitting, generalized quadratic curve fitting, etc.).

It is recommended to purchase injection pumps or peristaltic pumps for testing the forward/backward angle. There are two ways to form the forward/backward angle: (1) increasing/decreasing the droplet volume to form the forward/backward angle; (2) The sample table tilts to form a forward and backward angle. As shown in the figure above

2. Real graph of irregular contact angle analysis:

The picture shows the actual effect of silicone gel, and the contact angle value is calculated using curve ruler fitting technology. The fitting factor is over 90%.

Figure 2 Analysis method: Spline curve fitting method or Young Laplace equation fitting method

3. Special statement:

1. The above image information and technical parameters are subject to changes due to design without further notice, and the latest confirmed product information shall prevail. TrueDrop ®、 RealDrop ®、 Asha ®、 ADSA ®、 CAST ® It is a registered trademark of Shanghai Solon

2. Our company reserves all rights.

CAST^®Asha^®、ADSA^®、TrueDrop^®、RealDrop^®、TheDrop^®、MicroDrop^®、LMCA^®、Shsolon^®Solon^®Register a trademark for Shanghai Solon.

The above trademark is used for goods or services related to contact angle measuring instruments, surface tension meters, and interfacial tension meters. Infringement will be prosecuted!