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