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Home > Contact Angle and Interface Tension Measurement

 Contact Angle and Interface Tension : SDL200

 Features and Benefits:
         1. The integration of optical and CCD camera
             can display the image of drop legibly on the
             computer screen.

         2. The image taken instantaneously can minimize
             the error of liquid evaporation.
         3. Special made manual obliquitous flat and
             peristaltic pump for application of sample are
             more convenient for measuring forwarding
             angle and back off angle.
         4. The overall structure of the instrument includs
             the mode of four dimensional motion adjustment.

        Contact angle is the angle between interfacial tangents of gas-liquid and solid-liquid, when liquid drop down on the surface
   of solid. Nano-material science and engineering has become an international investigating domain, so contact angle is frequently
   to be concerned about the surface modification of nano-material.

        SDL200 static drop contact angle and interface tension measurement instrument is applied to measure the soakage of solid
   by liquid. The contact angle between individual liquid as well as individual solid can be measured accurately. Samples can be
   solid material like film or fiber, tablet made of powder and other available material. Besides the contact angle, the instrument
   also can measure the parameters like surface/interface tension, CMC, the geometry size of drop as well as the free surface


Instrument units

Fundamental            configuration

Peristaltic pump for application of sample, video collecting memory, manual CCD, obliquitous flat, CCD camera, optics zoom system, sample setting flat and video analyzing measurement system.

Optional units

Manual obliquitous sample setting flat, automatic electric control of temperature system, premium zoom system, self-sampling system, automatic video analyzing system and dynamoelectric 4D flat.


a. Measuring contact angle( height testing, angle testing)

b. Measuring surface tension and CMC (suspending drop)

c. Investigating and measuring the geometry size of drop (suspending drop)

d. Computation of surface free energy (Owens)

Measurement methods

a. Instantaneous intercepting the image

b. Consecutive shooting automatically (one image in 1s-3600s)

c. Automatic slow motion (12 images per second)

Contact angle range


Magnification ratio


Accuracy of measurement

0.25 o or 0.5 o

         Product Series


SDL200B with extra big flat which has the geometry size of 400*400mm(21inch LCD available) is designed specially for investigation or quality control of dyeing, silicon, painting and printing, plasma. This series of products has been widely used as the international third LCD manufacturer to control and testing products all over the world.


SDL200C has round sample flat with the size of ф50mm-ф81mm (height: 5mm-30mm). SDL200C is mostly used to measure the round protruding resin or eyeglass.


SDL90 powder contact angle measurement instrument can test the powder wetting ability by the liquid based upon Wasburn filtering method.


         Product Catalogue

         Contact us:   Sales Director: Andrew Linken    Email: sale@sentinaininc.com
                            Technical Director: Jack F.         Email: tech@sentinaininc.com
                            Service Support: Dacheng Dang   Email: service@sentinaininc.com

    Without Notification when all products are subjected to technical changes. Please contact us immediately if you want to get more information about the products. We are looking forward to sincere cooperation with you.