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