Optical Tensiometers / Goniometers
Attension® Theta Optical Tensiometers
Class-Leading Camera
Get the most accurate data with the highest pixel density, frame rate, and field-of-view camera on the market
All-Inclusive Software
Free access to the OneAttension software, with regular updates for the lifetime of the instrument
Modularity
Modular and upgradeable with a wide array of plug-and-play accessories for advanced experiments
Roughness Correction
Automatically correct for roughness on the sample surface at the exact site of the droplet
Download the Attension® Theta Product Brochure
See available configurations
Attension® Product Options
The best-in-class instrument for measuring contact angle, surface tension, surface free energy, dynamic contact angle, and much more. Includes features that remove user bias and streamlines processing with key instrument settings, improving data quality.
The Theta Flex is an award-winning, advanced, and versatile optical tensiometer for highly accurate measurements of static and dynamic contact angle, roughness-corrected contact angle, surface free energy, surface and interfacial tension, and interfacial rheology.
The Theta Lite is a compact, entry-level and accurate optical tensiometer for static and dynamic contact angle, surface free energy and much more. Ideal for basic research and quality control but boasts the same precision and all-inclusive software as our more advanced Theta Series systems.
Model: |
Theta Flow |
Theta Flex |
Theta Lite |
|---|---|---|---|
Compatible Modules |
|||
| Needle-in dynamic contact angle | Automatic | Automatic | Automatic |
| Tilting dynamic contact angle | Automatic | Automatic | Manual |
| Pulsating drop | |||
| 3D Topography | |||
| High Pressure | |||
| Drop Profile Fitting Method | Young-Laplace (CA, ST/IT, M), Bashforth-Adams (ST/IT), Circular (CA), Polynomial (CA, M) | ||
Hardware |
|||
| Measuring range (°, mN/m) | 0 – 180, 0.01 – 2000 | ||
| Accuracy (°, mN/m) | ±0.1, ±0.01 | ||
| Maximum sample size (mm) | Unlimited x 100 x 320 | Unlimited × 100 × 320 (with stage) | Unlimited × 45 × 200 (with stage) |
| Maximum resolution (px) | 2592 × 2048 | 1984 × 1264 | 1280 × 1024 |
| Maximum measuring speed (fps) | 3422 | 3009 | 2068 |
| Image focusing | Software-controlled autofocus, manual fine focus in optics | Manual fine focus in optics | Manual fine focus by optical rail |
| Light source | LED based homogeneous background lighting | LED based homogeneous background lighting | LED based background lighting |
| Field of view (Ø, mm) | 1.44 – 45.3 | 1.44 – 32.3 | 2.9 – 12 |
| Environment monitoring | |||
Theta Measurements
Possible Measurements - Theta
Contact Angle Measurments
This video will demonstrate a contact angle measurement with Attension Theta Flex. Attension Theta Flex automatically deposits droplets and analyzes the contact angle for immediate, accurate results.
Dynamic Contact Angle Measurement
Dynamic contact angles on the Theta optical tensiometers are a powerful method to quantify the level of heterogeneity of a surface, adhesion, and surface cleanliness. This video shows how the tilting and needle-in methods are carried out with the OneAttension software.
Surface and Interfacial Tension Measurement
This video will demonstrate a surface tension measurement with Attension Theta Flex. Attension Theta Flex automatically forms a pendant drop of desired size and determines the surface/interfacial tension from its drop shape.
Meniscus Contact Angle Measurement
When measuring the contact angle on small rods or fibers, traditional droplet sizes can be inadequate. This video introduces the special meniscus measurement mode with the Theta optical tensiometers that analyze the meniscus shape on rods, plates, or fibers to automatically measure the contact angle.
Batch Contact Angle Measurement
Contact angle measurements with water are an excellent tool for surface quality control. This video highlights how the batch contact angle measurement mode can be used for simple and efficient surface quality control measurements with the Theta optical tensiometers.
Knowledgebase
Tensiometry Knowledgebase
Webinar
Measuring Wettability and Interfacial Tension for EOR Optimization
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How Wettability Analysis Improves Semiconductor Package Performance and Reliability
As semiconductor devices continue to shrink and packaging architectures grow more complex,…
White Paper
Surface and interfacial tensions of liquids significantly affect their wetting behavior an…


