Bubble Pressure Tensiometer BP100
- Bubble Pressure Tensiometer BP100
Printing – bonding – spraying – cleaning:
Processes such as these require surfactants that are already effective in fractions of a second – and an instrument that can record their effectiveness.
The Bubble Pressure Tensiometer BP100 determines the dynamic surface tension as a function of the surface age. Thus the instrument provides information about wetting and drop formation in rapid processes.
Features of the Bubble Pressure Tensiometer BP100
- Measurement of the dynamic surface tension at constant or variable surface age
- Wide range of surface age:
- 5 ms (high dynamic) up to 100 s (almost static)
- Fully automatic measuring process by software controlled immersion of the capillary
- Determination of the adsorption and diffusion coefficient
- Integrated compressor - no compressed air supply necessary
Bubble Pressure Measurement with the BP100
A software-controlled flow of air emerging from a capillary produces air bubbles in the sample. A high-precision pressure sensor determines the maximum pressure during bubble formation, from which the surface tension is calculated. Thanks to its built-in compressor the instrument does not need an external compressed air connection. Thermostatted measurements are possible without any problems.
Scans with an almost unlimited resolution over a wide range of surface ages are controlled automatically by the LabDesk software. In addition to the time-dependent surface tension, the measurement also supplies the equilibrium value according to Hua & Rosen. Diffusion and adsorption coefficients can be calculated from surfactant concentration series – these are important parameters where the mobility of surfactants is concerned. Measurements at constant bubble ages allow further insights, e.g. for concentration or temperature comparisons.
After a minimal preparation period the measurement is carried out fully automatically up to data output in the form of a plot. With a mouse-click measuring parameters, results and evaluations appear in a comprehensive report. Thanks to the LabDesk™ software platform for all KRÜSS tensiometers data from other instruments can be included.
Application
- Surface-active agent development
- Optimization of spraying processes
- Development of detergents and cleansing agents
- Optimization of coating and printing processes
- Electroplating bath concentration control
Technical Data of Bubble Pressure Tensiometer BP100
Measuring range | |
SFT (1) | 10 ... 100 mN/m |
Temperature | -10 to 100 °C |
Resolution | |
SFT | ± 0.01 mN/m |
Temperature | ± 0.01° |
Surface age (1) | 5 ms - 100 s |
Interfaces | USB, RS232C |
Power consumption | max. 30 W |
Power supply | 100 – 240 V AC; |
Weight | 15 kg |
Dimensions | 300 × 540 × 320 mm |
(1) depending on capillary and liquid |
List of accessories
| For informationen on accessories, please open the list Complete list |  |
Measuring Methods
- Bubble Pressure Method
- Measurement of surface tension at constant surface age
- Measurement of surface tension at any surface ages from 5 to 100,000 ms