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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