Theta range of Optical TensiometersUK based Dyne Testing supplies a complete range of contact angle meters for the determination of wetting characteristics of solid materials.  Contact angle meters  (also known as optical tensiometers or goniometers) allow direct measurements of surface tension, interfacial tension and contact angles. Contact angle is an extremely versatile technique used for characterization of both liquids and solids.

The Contact Angle Meter (optical tensiometer) is an ideal industrial or academic tool for product development engineers, R & D engineers who need precision and repeatability.  Contact angle measurement combines high technology test instrumentation and a non-destructive testing method to allow an accurate, objective and repeatable analysis to be made. Using the contact angle meter you can compare the effects of a range of surface treatments and gather data that correlates to various surface conditions e.g. lubricity, wettability, surface energy etc.

The equipment captures drop images and automatically analyses the drop shape as a function of time. The drop shape is function of surface tension of liquid, gravity and the density difference between sample liquid and surrounding medium. On a solid the liquid forms a drop with a contact angle that also depends on the solid’s surface free energy. The captured image is analysed with a drop profile fitting method in order to determine contact angle and surface tension.

The Attension ® Theta Optical Tensiometer and Thetalite Optical Tensiometer are easy to use, offer highly repeatable QC and are an analytical tool for measuring the contact angle on a variety of substrates.  The Portable Contact Angle Meter  is a hand-held non-destructive portable contact angle meter for quantifying levels of surface preparation from the lab to the factory floor.

For more information on contact angle, click on one of the products below or view the complete range via the following link.

Attension  Range of Optical Tensiometers

Theta Optical Tensiometer for the measurement of surface energyTheta optical tensiometer allows highly accurate and easy characterisation of both solids and liquids. spreading and surface heterogeneity. Theta Lite Optical Tensiometer - Surface Energy MeasurementThetaLite optical tensiometer is a compact and robust optical tensiometer for simple and accurate measurements of contact angle and surface free energy.
Theta Topography ModuleTheta 3D Topography Module an add-on module for the Theta capable of separating the effect of surface roughness to the contact angle result. 
Theta_with_HPC.v2Theta High Pressure Chamber an add-on module for the Theta Optical Tensiometer. It enables optimal interfacial tension and contact angle measurements at high pressures and temperatures.
surface-analyst-resizedPortable Contact Angle Meter  hand-held non-destructive portable contact angle meter for quantifying levels of surface preparation from the lab to the factory floor.

Standards for Optical Tensiometers

Here you can find information about the following standards:

  • ISO 15989:2004
  • ISO 27448:2009
  • ASTM D7334-08
  • ASTM D7490-08
  • ASTM D5946-09
  • ASTM C813-90 (2009)
  • ASTM G205-10
  • T 458 cm-04