· 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.
Hardware
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
- 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
Features
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
- 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.