Our Theta range systems come in ready-made packages optimized for different automation levels. 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
-
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