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

 
Dispenser
Droplet placement
Sample stage
Camera
Possible upgrades
Theta Auto 4
 Auto, 4 liquids Auto Auto XYZ 1984×1264 max 3009 FPS Full
Theta Auto 3 Double
 Auto, 2 liquids Auto Auto XYZ 1984×1264 max 3009 FPS Full
Theta Auto 3
 Auto, 1 liquid Auto Auto XYZ 1984×1264 max 3009 FPS Full
Theta Auto 1B Double
 Auto, 2 liquids Auto Manual XYZ 1984×1264 max 3009 FPS Full
Theta Auto 1B
 Auto, 1 liquid Auto Manual XYZ 1984×1264 max 3009 FPS Full
Theta BasicTips Double  
 Auto, 2 liquids Manual Manual XYZ 1984×1264 max 3009 FPS Full
Theta BasicTips
 Auto, 1 liquid Manual Manual XYZ 1984×1264 max 3009 FPS Full
Theta Basic
 Manual Manual Manual XYZ 1984×1264 max 3009 FPS Full
Theta Lite Auto 2  
 Auto, 2 liquids Manual Manual YZ 1280 x1024 max 2068 FPS Limited
Theta Lite Auto 1  
 Auto, 1 liquid Manual Manual YZ 1280 x1024 max 2068 FPS Limited
Theta Lite
 Manual Manual Manual YZ 1280 x1024 max 2068 FPS Limited

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

 
Theta
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
 √ √
Captive bubble
 √ √
Pendant drop
 √ √
Reverse pendant drop
 √ √
Meniscus
 √ √
Dynamic contact angle
 Automatic Manual
Pulsating drop
 √ –
3D Topography
 √ –
High pressure
 √ –

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×95×180 (with stage) Unlimited×45×200 (with stage)
Maximum resolution (px)
 1984×1264 1280×1024
Maximum measuring speed (fps)
 3009 2068
Frame interval
 0.33ms … 1000 s 0.48ms … 1000 s
Camera
 USB 3.0 digital camera with zoom USB 3.0 digital camera
Light source
 LED based background lighting LED based background lighting
Field of view (Ø, mm)
 1.44…30  2.9…12 
Dimensions — Basic frame (L×W×H, cm)
 74×20×59 49.5×13×31
Weight — Basic frame (kg)
 7.3 5
Power supply (VAC)
 100…240 100…240
Frequency (Hz)
 50…60 50…60

Drop Profile Fitting Method
Young-Laplace (CA, ST/IT, M)*
 √ √
Bashforth-Adams (ST/IT)*
 √ √
Circular (CA)*
 √ √
Polynomial (CA, M)*
 √ √

Software
Provided software
 OneAttension OneAttension

System Requirements
Recommended system requirements
  • 2 GHz processor
  • 2 GB RAM
  • 120 GB hard disk drive1
  • 1024×768 resolution
  • 1 USB2 or USB3 port, 1 x USB3 port
  • 1 additional USB2 port with 3D topography module

1SSD hard disk (min. 500MB/s) needed for high speed recording with high resolution
Operating system requirements
  • Windows 7 & 8 & 10 (32 or 64 bit)

CA: Contact angle | ST/IT: Surface tension and Interfacial tension | M: Meniscus