The Theta Flow is the premium contact angle meter suitable for demanding surface research and quality control. This user-friendly instrument is part of the Theta range of optical tensiometers and brings automation to a new high and offers improved accuracy with its high-end camera, image enhancement and sensors.
On top of the features available with the Theta Flex, additional main features of the Theta Flow include:
- Heightened level of automation – Camera autofocus, automatic surface mapping, and automatically generated results, bringing for optical tensiometers, simplifying the measurements and increasing accuracy.
- Highly accurate results – with a camera resolution at 5 MP, image enhancements with DropletPlus technology and sensors keeping track of the surrounding environment for good traceability, Theta Flow will provide . The reliable data, in turn, is a key component for user-independent measurements.
- Greater user experience – the touch display makes measurement preparation super smooth to handle. Everything from filling the liquids to changing your sample can be done easily at the instrument in seconds.
With optional motorised sample stage, motorised vertical movement and a choice of dispensing systems, Theta Flow can function in a fully automated mode, placing drops in predetermined locations on the substrate and measuring the contact angles.
- Fully automatic measurements avoids user variation and saves time.
- Select ready-made experiment recipes or create custom programs for quick and repeatable operations.
- Automatic base line detection and drop shape fitting.
- Contact angle on curved surfaces (circular or near-circular).
- Flexible and programmable frame per second rate recorded by the camera.
For a breakdown on the technical specifications of the complete Theta Flow range, please click on the Downloads tab below. Click on the video tab also for an overview of how the instrument works.
Please contact our Sales team to discuss the instrument in further detail.
ThetaFlow is an advanced optical tensiometer for high accuracy and easy measurement of: –
- 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
Pulsating drop method
| Measuring range | 0…180°, 0.01…2000 mN/m |
| Accuracy | ± 0.1°, 0.01 mN/m |
| Maximum sample size | W unlimited x 100 mm x 320mm (with stage) |
| Integrated sample holders | Yes |
| Maximum resolution (px) | 2592 x 2048 (5 MP) |
| Max. measuring speed (fps) | 3422 |
| Camera | CMOS 1″ USB 3.0 digital camera with zoom |
| Image focusing | Software-controlled autofocus, manual fine focus in optics |
| Image quality | Enhanced with DropletPlus technology, Native |
| Camera protection | Inside instrument covers |
| Camera view angle | -4.5….2.5° with digital scale |
| Light source and size | High power monochromatic LED, 62 x 62mm |
| Field of view (Ø, mm) | 1.44…45.3 |
| Measurement indicator LED | Yes |
| Integrated touch display | Yes |
| Environment monitoring | Yes |
| Disposable tip dispensing | Yes |
| Software | OneAttension, includes all measurement modes |
| Dimensions | H 435 mm, W 230 mm, L 765 mm |
| Weight (basic frame) | 29 Kg |
| Power supply | 100…240 VAC |
| Frequency | 50-60 Hz |
Recommended System Requirements:
2 GHz processor, 2 GB RAM, 120 GB hard disk drive1, 1920 x 1080 resolution, 1 USB 3.0 port.
1 SDD hard disk (min. 500 MB/s) needed for high speed recording with high resolution
Operating System Requirements:
Windows 10 (32 or 64 bit).
| Contact our Sales Team directly to discuss your individual requirements. See typical configurations below & refer to the product brochure. |
| Dispenser | Droplet placement | Sample stage | ||
| Theta Flow Auto 5 | Auto, 4 liquids | Auto | Auto XYZ | |
| Theta Flow Auto 4 | Auto, 2 liquids | Auto | Auto XYZ | |
| Theta Flow Auto 3 | Auto, 2 liquids | Auto | Auto X, Manual YZ | |
| Theta Flow Auto 2 | Auto, 1 liquid | Auto | Auto X, Manual YZ | |
| Theta Flow Auto 1 | Auto, 1 liquid | Auto | Manual XYZ |
Complement your system with the additional modules that will enable further capabilities:
- 3D Topography Module: Roughness-corrected contact angle measurements automatically with a single click. For studying the effect of surface roughness to contact angle results.
- High Pressure Chamber: Enables measurements at pressures up to 400 bars and temperatures up to 200°C. Designed for enhanced oil recovery and super-critical fluid applications.
- Pulsating Drop Module – PD 200: Oscillates drop volume for interfacial rheology studies.
- Tilting Cradle: For fully automatic dynamic contact angle and roll-off angle measurements by the tilted drop method.
- Environmental Chambers: To control the measurement environment including the temperature.
Please contact our sales team to discuss your individual requirements.
Attension-Theta-Range-Optical-Tensiometers-Brochure-2021