New Developments 1/5/18

A new generation of bubble pressure tensiometers, including BPA-2P and BPA-2S , as follow up developments of the excellent predecessors BPA-1P and BPA-1S , are available more...

New Books 1/5/18

Textbook “Dispersionseigenschaften - Stabilität, 2D-Rheologie, 3D-Rheologie“ This textbook contains the main fundamental knowledge on interfaces, colloidal systems more...

Latest events 1/1/19

2D-3D Rheology and Stability of Disperse Systems - User Workshop, Juni 03-05, 2019, Potsdam, Germany In Juni 2018 the 2D-3D Rheology and Stability of Disperse Systems more...

Profile Analysis Tensiometer PAT1P

A 35     PAT-1M Screenshot           

·         Very compact profile analysis tensiometer
·         Simple manual instrument to measure surface and interfacial tension of liquids
·         Contact angle measurements are available in the basic version
·         No power supply needed (powered by USB)
·         Ideal instrument for educational purposes

The principle is based on the analysis of the profile of pendent and sessile drops or buoyant and captive bubbles. PAT is well suited to determine the contact angle of liquids on solid surfaces.



Instrumental parts

- Basic platform on which all parts are safely mounted
- Manual x/y -axis
- Syringe for manual drop/bubble formation

- Thermostated jacket for external circulation bath
- USB industrial camera with fixed objectives (no frame grabber needed)
LED lighting with continuously adjustable intensity


Measurement Features
- Surface and interfacial tension of liquids
- Contact  angle according to the sessile drop method

Main features of the software
- on-line interfacial tension/contact angle calculation
-  transient relaxation experiments
- calculation of the dilation rheological parameters from relaxation measurements via Fourier analysis

Technical Specifications

Range of surface and interfacial tension 10 to 2000 mN/m
resolution: ± 0.05 mN/m
Range of contact angle measurement 5° to 175°
accuracy ±0.3°
Dosing manual drop/bubble formation
Measuring options automatic drop volume/area control (optional)
pendent drop, buoyant bubble, sessile drop surface / interfacial tension
dilational elasticity
contact angle
surface free energy
drop/bubble oscillations 0.001 to 1 Hz (optional)
Optics manual fixed objectives
Camera Industrial CMOS-camera:
max. resolution 1280 x 960 pixels USB, optical distortion: < 0.05 %
Frame rate up to 25 images/s
Axis manual x-axis, manual y-axis 
Illumination LED, manually controlled light intensity
Software OS Windows 7, 8, 8.1 or 10
free update over 1 year after purchase
Interface USB 
Size of device (L xW x H) 400 x 200 x 200mm (standard version)
Weight 3 kg
Power supply Powered by USB bus
Extra accessories additional capillaries on request

Measurement Examples

There is a large number of experimental examples given in the listed references to journal publications.