Overview

What you can measure

  • 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
  • Roughness-corrected contact angle and 3D surface roughness 
    Fringe projection phase shifting method
  • Interfacial dilatational rheology
    P
    ulsating drop method

Widen your view

This 3-minute video will give you a full view of how Attension Theta Flow works as well as the main advantages of the optical tensiometer. Watch the video in fullscreen for the best experience! 

3 reasons to invest

Automation at an all-time high

Camera autofocus, ensuring the image to always stay clear, automatic surface mapping, where the sample can be moved into different measurement positions, and automatically generated results with the industry-leading OneAttension software. These are the features bringing automation to a new level for optical tensiometers, simplifying the measurements and increasing accuracy 

Accuracy and user-independence

With a camera resolution at 5 MP, image quality enhancement with DropletPlus technology, and sensors keeping track of the surrounding environment for good traceability, Theta Flow will provide highly accurate results. The reliable data, in turn, is key component for user-independent measurements 

Easy to use with touch display

The touch display improves the user experience making measurement preparation super smooth to handle. Everything from filling the liquids to changing your sample can be done easily at the instrument in seconds.

  

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Specifications

A closer look

Check out the specifics of Theta Flow and compare it to our Theta Flex and Theta Lite to find out what you need. Theta Flow systems come in ready-made packages optimized for your automation level. Other packages can also be formed easily thanks to the modular design.

 
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

LED based homogeneous background lighting, 62 x 62 mm LED based background lighting, Ø 20 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
 
Dispenser
Droplet placement
Sample stage
Camera
Possible upgrades
Special features
Theta Flow Auto 5
Auto, 4 liquid Auto Auto XYZ 2592 x 2048 px, max 3422 FPS Full Autofocus Touch display Environment tracing Measurement indicator
Theta Flow Auto 4
Auto, 2 liquid Auto Auto XYZ 2592 x 2048 px, max 3422 FPS Full Autofocus Touch display Environment tracing Measurement indicator
Theta Flow Auto 3
Auto, 2 liquid Auto Auto X, Manual YZ 2592 x 2048 px, max 3422 FPS Full Autofocus Touch display Environment tracing Measurement indicator
Theta Flow Auto 2
Auto, 1 liquid Auto Auto X, Manual YZ 2592 x 2048 px, max 3422 FPS Full Autofocus Touch display Environment tracing Measurement indicator
Theta Flow Auto 1
Auto, 1 liquid Auto Manual XYZ 2592 x 2048 px, max 3422 FPS Full Autofocus Touch display Environment tracing Measurement indicator
Theta Flex Auto 4
Auto, 2 liquids Auto Auto XYZ 1984 × 1264 px, max 3009 FPS Full Measurement indicator
Theta Flex Auto 2
Auto, 2 liquids Auto Auto X, Manual YZ 1984 × 1264 px, max 3009 FPS Full Measurement indicator
Theta Flex Auto 1
Auto, 1 liquid Auto Manual XYZ 1984 × 1264 px, max 3009 FPS Full Measurement indicator
Theta Flex Plus
Auto, 1 liquid Manual Manual XYZ 1984 × 1264 px, max 3009 FPS Full Measurement indicator
Theta Flex Basic
Manual Manual Manual XYZ 1984 × 1264 px, max 3009 FPS Full Measurement indicator
Theta Lite Auto 2
Auto, 2 liquids Manual Manual XZ 1280 x 1024 px, max 2068 FPS Limited
-
Theta Lite Auto 1
Auto, 1 liquid Manual Manual XZ 1280 x 1024 px, max 2068 FPS Limited
-
Theta Lite Basic
Manual Manual Manual XZ 1280 x 1024 px, max 2068 FPS Limited
-

Software

OneAttension Software

OneAttension software for Theta Flow is a fine combination of a very intuitive interface and wide functionality. Its cornerstones are a high level of automation, ease of use, and top accuracy. Let's have a look at the features!

 

OneAttension Features

  • Autofocus keeps the picture sharp
    Less user-dependency, more accuracy
  • User-friendly interface
    To get you going in no time
  • Automatic baseline detection and drop shape fitting
    For user-independent precision
  • Seamless interplay with integrated touch screen
    Set up your measurements in seconds
  • Optimized image quality
    Ultra-high resolution image optimized with DropletPlus technology for reliable results
  • Batch contact angle mode
    When you have plenty of tests to run in no time
  • Fully automatic dynamic contact angle mode with the needle method
    For user-independent results
  • Monitors the measurement environment
    High traceability of results linked to measurement conditions 

Accessories

Add more possibilities

With the modular design and an extensive range of modules and accessories you have room to upgrade or change the Attension Theta Flow as your needs evolve. Have a look at a few selected examples or explore the full range below.

t316

Topography 3D module

Theta Flow can be combined with the unique 3D Topography module that takes the wettability and adhesion analysis to a completely new level by measuring both contact angle and surface roughness of the sample in a single measurement. Distinguish the effect of roughness on contact angle and surface free energy.

t317

High Pressure Chamber

The High Pressure Chamber is designed for wettability research within enhanced oil recovery and enables measurements at pressures up to 400 bars and temperatures up to 200°C. Integrated chamber piston and sample port are optimized for the best usability and versatility.

c204a

Tilting cradle

A software controlled tilting cradle. Used for studying dynamic contact angles. Tilting range from 0 to 90° and tilting resolution 0.1°. The vacuum stage top C204B is recommended to be used with this option.

t214

Pulsating Drop Module - PD200

Software controlled drop size pulsing for interfacial rheology measurement of viscoelastic properties of interfacial layers at liquid-air or liquid-liquid interfaces. 

t315a

Picoliter Dispenser

Automated picoliter-scale drop formation. Especially for inkjet applications and for measuring contact angle on very small sample areas.

Testimonials

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 Flow. 

citat8

 

Mika Latikka, PhD, Postdoctoral Researcher, Soft Matter and Wetting. Aalto University

”The touch display in Theta Flow makes measurement preparation faster and simpler. Actions like changing the sample and sample liquid are greatly facilitated which allows increasingly efficient measurements.” 
Aalto_University_logo-sv

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. 

 

citat8

 

Researcher at MIT, US

“The reproducibility of the measurements acquired is excellent even with the lowest surface energy values and the tensiometers are quite flexible with regards to sample size. The software is also very useful and the customer support for the products is excellent.”

MIT-logo-gray-lightgray

MIT, US

MIT, Massachusetts Institute of Technology, is a world-leading research university with a mission to advance knowledge and educate students in science and technology. MIT uses our tensiometers to study contact angles and interfacial energy. 

Knowledge

Learn more

We have gathered all our in-depth knowledge associated with Theta Flow. Browse around amongst webinars, overviews and videos to find a topic of your interest. 

  • Attension
The Importance of Contact Angle in Industry
Overview

The Importance of Contact Angle in Industry

Get examples of how contact angle measurements are utilized in different industries.

Get it
  • Attension
Contact Angle Hysteresis and the Roll-off Angle with Tilting Method
Video

Contact Angle Hysteresis and the Roll-off Angle with Tilting Method

Find out how contact angle hysteresis and roll-off angles can be measured in practice.

Watch
  • Attension
Automated Dynamic Contact Angle Measurement with Needle Method
Video

Automated Dynamic Contact Angle Measurement with Needle Method

See the measurement in practice in this short video.

Watch
  • Attension
Effect of Wettability in Biomedical Applications
Overview

Effect of Wettability in Biomedical Applications

Explore why wettability measurements are an important part of biomaterial characterization.

Get it
  • Attension
The Influence of Surface Roughness on Wettability
White Paper

The Influence of Surface Roughness on Wettability

Learn how surface roughness is measured with Theta Topography and in what applications it is useful.

Download
  • Attension
Superhydrophobic Surfaces - From Lab to Real Life Applications
Webinar

Superhydrophobic Surfaces - From Lab to Real Life Applications

Listen to Professor Robin Ras sharing his expertise on superhydrophobic surfaces.

Go there
  • Attension
Enhanced Oil Recovery - Measuring Minimum Miscibility Pressure
Webinar

Enhanced Oil Recovery - Measuring Minimum Miscibility Pressure

Hear Professor Sandro da Rocha on how to determine the pressure at which CO2 is miscible with oil.

Go there
  • Attension
Wettability Alteration in Carbonate Reservoir
Overview

Wettability Alteration in Carbonate Reservoir

You get an introduction to wettability in a carbonate reservoirs and a view of the most used enhanced oil recovery methods.

Get it
  • Attension
Enhanced Oil Recovery using Nanoparticles
Case Study

Enhanced Oil Recovery using Nanoparticles

We show you how nanoparticles can be utilized to enhance oil recovery and how contact angle measurements can be used.

Get it
  • Attension
How do Pressure and Temperature Affect on Wettability?
Overview

How do Pressure and Temperature Affect on Wettability?

In enhanced oil recovery it is important to find out how pressure and temperature affect wettability. We show you how.

Get it
  • Attension
Wettability Measurements for Enhanced Oil Recovery Optimization
White Paper

Wettability Measurements for Enhanced Oil Recovery Optimization

You get an overview of the most relevant wettability measurement methods for enhanced oil recovery optimization.

Download
  • Attension
A Prove of Superior Coating Quality by Dynamic Contact Angle Measurement
Case Study

A Prove of Superior Coating Quality by Dynamic Contact Angle Measurement

Follow a real life example of coating development using dynamic contact angle.

Get it
  • Attension
Effect of Temperature and Pressure on Wettability of Solids
Webinar

Effect of Temperature and Pressure on Wettability of Solids

Listen to Professor Zhenghe Xu sharing his knowledge on bitumen recovery.

Go there
  • Attension
How to Measure Superhydrophobic Surfaces in Practice?
Webinar

How to Measure Superhydrophobic Surfaces in Practice?

Learn how your measurements should be conducted for reliable results and what instrumentation you need.

Go there
  • Attension
CO2-in-water Foam
Webinar

CO2-in-water Foam

Hear Professor Sandro da Rocha on CO2-in-water foams and how to design surfactants for these systems.

Go there
  • Attension
Surface Free Energy Methods
Overview

Surface Free Energy Methods

You get an introduction to surface free energy methods and a comparison chart.

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  • Attension
The Importance of Surface Tension in Industry
Overview

The Importance of Surface Tension in Industry

Detergents, paints, food. We give you examples to how surface and interfacial tension measurements are utilized in different industries.

Get it
  • Attension
Contact Angle - What is it and how do you measure it?
White Paper

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

Learn more about one of the most used measurement method to study the wettability of the surface.

Download
  • Attension
Surface Free Energy - What is it and how to measure it?
White Paper

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

We explain the concept of surface free energy and present the most important theories behind it.

Download
  • Attension
Surface Free Energy in Practice
Webinar

Surface Free Energy in Practice

We give you the reasons why to measure surface free energy and show how it is done.

Go there
  • Attension
Wettability of Contact Lenses
Overview

Wettability of Contact Lenses

Get an overview of wettability and contact angle on contact lens and an introduction to captive bubble method.

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  • Attension
Surface and Interfacial Tension
White Paper

Surface and Interfacial Tension

Study the different measurement methods to select the best choice for your application.

Download
  • Attension
Determination of Optimal Plasma Treatment Time of Polypropylene
Case Study

Determination of Optimal Plasma Treatment Time of Polypropylene

Learn how contact angle and surface free energy can be utilized to determine the optimum plasma treatment time.

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  • Attension
Why Interfacial Rheology is Important
Overview

Why Interfacial Rheology is Important

Get examples on why interfacial rheology is important in various industries.

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  • Attension
Characterizing Water Repellency with Dynamic Contact Angles
Webinar

Characterizing Water Repellency with Dynamic Contact Angles

Learn about dynamic contact angles from our experts, and find out why it is useful when characterizing the water repellency of a surface.

Go there
  • Attension
Evaluation of Biomedical Coatings with Contact Angle Measurement
Case Study

Evaluation of Biomedical Coatings with Contact Angle Measurement

Learn how contact angle measurements can be used to evaluate biomedical coatings.

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  • Attension
Interfacial Rheology as Emulsion and Foam Stability Indicator
Case Study

Interfacial Rheology as Emulsion and Foam Stability Indicator

Shows how interfacial rheology measurement can be used as quality control tool.

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  • Attension
Quality Control of Surfaces for Good Wettability and Coating Adhesion
Webinar

Quality Control of Surfaces for Good Wettability and Coating Adhesion

As wettability is the most important factor indicating good adhesion, contact angle measurements are commonly used to ensure process quality.

Go there
  • Attension
Adhesion - How to Use Contact Angle to Predict Adhesion and Bonding
White Paper

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

Adhesion is important in all applications where two dissimilar materials are adhered together. Contact angle measurements can be used to predict adhesion.

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  • Attension
Contact Angle Measurements in Electronics
Overview

Contact Angle Measurements in Electronics

Learn how contact angle measurements can be utilized in electronics.

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