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Surface Tensiometers


DY-300
Standard tensiometer

 


DY-500/DY-700
Versatile tensiometers

 


BP-D5
Bubble pressure tensiometer

Measurement of the surface tension of liquids

Wilhelmy Plate Method

Wilhelmy Plate Method

A balance system measures the force
of the liquid pulling on the plate

Du Noüy Ring Method

Du Noüy Ring Method

A balance system measures the force
of the liquid pulling on the ring

Pendant Drop Methods

Pendant Drop Methods

A software analyzes a digital image of
a droplet suspended from a needle tip

Bubble Pressure Method

Bubble Pressure Method

Determination of the maximum internal pressure of
an air bubble formed in a probe immersed in a liquid

Dynamic Surface Tension

Dynamic Surface Tension

Surfactants have the ability to lower surface or interfacial tensions over time with the molecules being absorbed to the newly created surface or interface. During the time span from a newly created surface until an equilibrium value of surface tension is reached, the Dynamic Surface Tension can be measured. While at equilibrium state of the liquid the Static Surface Tension can be measured. Detergents and solutions for coating purposes are being used in processes where new surfaces or interfaces are constantly being created, thus the determination of the Dynamic Surface Tension is of high importance.

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