Theta Flex and Theta Lite systems come in readymade packages optimized for different automation level needs. Other packages can also be formed easily thanks to the modular design.

 
Dispenser
Droplet placement
Sample stage
Camera
Possible upgrades
Theta Flex Auto 5
Auto, 4 liquids Auto Auto XYZ 1984 × 1264 px, max 3009 FPS Full
Theta Flex Auto 4
Auto, 2 liquids Auto Auto XYZ 1984 × 1264 px, max 3009 FPS Full
Theta Flex Auto 3
Auto, 1 liquid Auto Auto XYZ 1984 × 1264 px, max 3009 FPS Full
Theta Flex Auto 2
Auto, 2 liquids Auto Auto X, Manual YZ 1984 × 1264 px, max 3009 FPS Full
Theta Flex Auto 1 
Auto, 1 liquid Auto Manual XYZ 1984 × 1264 px, max 3009 FPS Full
Theta Flex Plus
Auto, 1 liquid Manual Manual XYZ 1984 × 1264 px, max 3009 FPS Full
Theta Flex Basic
Manual Manual Manual XYZ 1984 × 1264 px,  max 3009 FPS Full
Theta Lite Auto 2  
Auto, 2 liquids Manual Manual YZ 1280 x 1024 px,  max 2068 FPS Limited
Theta Lite Auto 1  
Auto, 1 liquid Manual Manual YZ 1280 x 1024 px,  max 2068 FPS Limited
Theta Lite Basic
Manual Manual Manual YZ

1280 x 1024 px, max 2068 FPS

Limited

Comparison chart of the technical specifications of the Attension Theta contact angle meters product range.

 
Theta Flex
Theta Lite

Available Measurements

Static contact angle
Dynamic contact angle
Automatic Manual
Surface/Interfacial tension
3D surface roughness
Interfacial rheology
Surface free energy
Zisman Plot, OWRK/Extended Fowkes, van Oss Acid-Base, Wu, Neumann’s Equation of State, Schultz 1 and 2

Available Measurement Methods

Sessile drop
Batch sessile drop
Captive bubble
Pendant drop
Reverse pendant drop
Meniscus
Dynamic contact angle
Automatic Manual
Pulsating drop
3D Topography

Hardware

Measuring range (°, mN/m)
0…180, 0.01…2000 0…180, 0.01…2000
Accuracy (°, mN/m)
±0.1, ±0.01 ±0.1, ±0.01
Maximum sample size (mm)
Unlimited×100×320 (with stage) Unlimited×45×200 (with stage)
Integrated sample holders
Yes Yes
Frame interval
0.33 ms ... 1000 s 0.48 ms ... 1000 s
Maximum resolution (px)
1984×1264 1280×1024
Maximum measuring speed (fps)
3009 2068
Camera
USB 3.0 digital camera with zoom USB 3.0 digital camera
Camera protection
Inside instrument covers Inside instrument covers
Camera view angle (°)
 -4.5 ... 2.5  -2 ... 2
Light source and size
LED based background lighting, 62 x 62 mm LED based background lighting, Ø 20 mm
Field of view (Ø, mm)
1.44…32.3 2.9…12 
Measurement indicator LED
Yes No
Disposable tip dispensing
Dimensions — Basic frame (L×W×H, mm)
 765 x 230 x 435  495 x 130 x 310
Weight — Basic frame (kg)
26 5
Power supply (VAC)
90…264 100…240
Frequency (Hz)
47 ... 440 50 ... 60