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Optical Tensiometer: Theta Flow

Premium contact angle meter suitable for demanding surface research and quality control. Enjoy a user-friendly instrument with a high level of automation and accuracy for user-independent results.

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Description

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

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×100×360 (with stage) Unlimited×100×360 (with stage) Unlimited×45×200 (with stage)
Integrated sample holders
✔ ✔ ✔
Maximum resolution (px)
2592 x 2048 (5 MP) 1936 x 1216 (2.3 MP) 1936 x 1216 (2.3 MP)
Maximum measuring speed (fps)
3422 2347 2347
Camera
CMOS 1” USB 3.0 digital camera with zoom CMOS1/2.3″ USB 3.0 digital camera with zoom CMOS1/2.3″ 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)
1.35…52.9 0.95…26 2.3…7.8
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

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