- Static contact angle
Sessile drop, captive bubble and meniscus methods - Dynamic contact angle
Dynamic contact angle, advancing and receding contact angle, contact angle hysteresis and roll-off angle - Surface free energy
Sessile drop, captive bubble and meniscus methods - Surface- and interfacial tension
Pendant drop and reverse pendant drop methods - Roll-off angle
- Batch contact angle
What you can measure
Widen your view
This 2-minute video will give you a quick overview of our optical tensiometer Theta Lite. Watch the video in fullscreen for the best experience.
3 reasons to invest
Incredibly easy to use
Packed with smart features
Designed for high accuracy
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A closer look
Dive into the specifications of Theta Lite and compare it to Theta Flow and Theta Flex to find out what you need. Consider automation level and need for double dispensers for handling more than one liquid.
Theta Flow |
Theta Flex |
Theta Lite |
|
Available Measurements |
|||
Static contact angle and captive bubble |
√ |
√ |
√ |
Batch contact angle |
√ |
√ |
√ |
Dynamic contact angle |
√ |
√ |
√ |
Meniscus contact angle |
√ |
√ |
√ |
Surface/Interfacial tension |
√ |
√ |
√ |
3D surface roughness and roughness-corrected contact angle |
√ |
√ |
- |
Interfacial rheology |
√ |
√ |
- |
Surface free energy |
Zisman Plot, OWRK/Extended Fowkes, van Oss Acid-Base, Wu, Neumann’s Equation of State, Schultz 1 and 2 |
||
Software and hardware |
|||
Measuring range (°, mN/m) |
0…180, 0.01…2000 |
0…180, 0.01…2000 | 0…180, 0.01…2000 |
Accuracy (°, mN/m) |
±0.1, ±0.01 |
±0.1, ±0.01 | ±0.1, ±0.01 |
Maximum sample size (mm) |
Unlimited×100×320 |
Unlimited×100×320 (with stage) | Unlimited×45×200 (with stage) |
Integrated sample holders |
√ |
√ |
√ |
Maximum resolution (px) |
2592 x 2048 (5 MP) |
1984 × 1264 (2.3 MP) | 1280 × 1024 (1.3 MP) |
Maximum measuring speed (fps) |
3422 |
3009 | 2068 |
Camera |
CMOS 1'' USB 3.0 digital camera with zoom |
CMOS 2/3'' USB 3.0 digital camera with zoom | CMOS 1/2'' USB 3.0 digital camera with fixed zoom |
Image focusing |
Software-controlled autofocus, manual fine focus in optics |
Manual fine focus in optics | Manual fine focus by optical rail |
Image quality |
Enhanced with DropletPlus technology, Native |
Native | Native |
Camera protection |
Inside instrument covers |
Inside instrument covers | Inside instrument covers |
Camera view angle (°) |
-4 ... 2.5, with digital scale |
-4.5 ... 2.5, with mechanical scale | -2 ... 2 |
Light source and size |
LED based homogeneous background lighting, 62 x 62 mm |
||
Field of view (Ø, mm) |
1.44…45.3 |
1.44…32.3 | 2.9…12 |
Measurement indicator LED |
√ |
√ |
- |
Integrated touch display |
√ |
- |
- |
Environment monitoring |
√ |
- |
- |
Disposable tip dispensing |
√ |
√ |
√ |
Software |
OneAttension, includes all measurement modes |
OneAttension, includes all measurement modes |
OneAttension, includes all measurement modes |
Dimensions — Basic frame (L×W×H, mm) |
765 x 230 x 435 |
765 x 230 x 435 | 495 x 130 x 310 |
Weight — Basic frame (kg) |
29 |
26 | 5 |
Power supply (VAC) |
100...240 |
100...240 | 100…240 |
Frequency (Hz) |
50...60 |
50...60 | 50 ... 60 |
OneAttension Software
We made our software for Theta Lite with you in mind. It is a fine combination of a very intuitive interface and high functionality. Follow your experiment live, and get the results within seconds. OneAttension is analyzing made easy. Let's have a look at the features!
OneAttension Features
- User friendly interface
To get you going in no time - Fully automatic dynamic contact angle mode with the needle method
For user independent results - Automatic baseline detection and drop shape fitting
For simplicity and precision - Batch angle mode
When you have plenty of tests to run in no time - Meniscus contact angle mode
When you are finding out the contact angle of fibers - Automated liquid purity checkup
So you can trust your results
Wetting and Adhesion analysis is now part of the all-inclusive OneAttension software!
Add more possibilities
A range of different accessories and modules expand the capabilities of Theta Lite. Explore the possibilities to widen your measurements with our selected favorites, or see the full list below.

Fluid bath heated cuvette chamber for interfacial tension studies with separate cuvette, 100°C (C208W)

Measuring chamber, fluid bath heated, 110° C (C203W)

Tilting stage (C218)
Tilting stage with manual tilting. Used for studying dynamic contact angles. Tilting range from 0 to 90°. Coarse and fine tilting movement.
What others say
Our instruments are present at many prestigious universities and research facilities world wide. Take a minute to find out what others say about Theta instruments.
Ville Jokinen, Aalto University
"When you're working with the instrument every day, automated reliable measurements are very important."
Watch the full story

Aalto University, Finland
Aalto University is a top Finnish university combining science, technology and arts into a collaborative environment for both scientific communities and companies. Our contact angle meters and tensiometers have been used there in research for decades.
Terry Qian, GSM, Apple
"I’m satisfied with Biolin Scientific customer service, quick response, efficient on-site support to setup the instrument and train end user on how to handle the machine properly. In especially urgent cases, Biolin Scientific always try to allocate resources to fulfill Apple needs. I really appreciate it."

Apple
Apple is an innovative American multinational technology company founded in 1976.
Learn more
We have gathered all our in-depth knowledge associated with Theta Lite. Browse around amongst webinars, case studies and white papers to find a topic of interest.
- Attension

The Importance of Contact Angle in Industry
- Attension

Surface and Interfacial Tension
- Attension

How to Measure Superhydrophobic Surfaces in Practice?
- Attension

Surface Free Energy Methods
- Attension

The Importance of Surface Tension in Industry
- Attension

Contact Angle - What is it and how do you measure it?
- Attension

Surface Free Energy - What is it and how to measure it?
- Attension

Surface Free Energy in Practice
- Attension

Wettability of Contact Lenses
- Attension

Surface and Interfacial Tension
- Attension

Determination of Optimal Plasma Treatment Time of Polypropylene
- Attension

Surface Tension and Surfactants in Industrial Processes
- Attension

Using Contact Angle Measurements in Surface Research and Quality Control
- Attension

Wettability Measurements in Biomedical Applications
- Attension

Characterizing Water Repellency with Dynamic Contact Angles
- Attension

Evaluation of Biomedical Coatings with Contact Angle Measurement
- Attension

Surface Evaluation for Good Wettability and Coating Adhesion
- Attension

Adhesion - How to Use Contact Angle to Predict Adhesion and Bonding
- Attension

Contact Angle Measurements in Electronics
- Attension

Superhydrophobic and Superhydrophilic Surfaces for Cell Trapping
- Attension
