Equipment: Bubble Pressure Tensiometer – Bpt Mobile, Krüss Gmbh
Technique:Bubble Pressure Tensiometer
Contact person (Technische Universität Dresden): Ali Shaygan Nia (ali.shaygan_nia@tu-dresden.de), Hans Kleemann (hans.kleemann1@tu-dresden.de)
Responsible: Ali Shaygan Nia (ali.shaygan_nia@tu-dresden.de), Payam Hashemi (payam.hashemi@tu.dresden.de)
Description:
Tasks and Applications
Checking the content of cleaner or wetting agent in a bath is an important QC task in many industrial processes:
- Cleaning as a preparation step before coating or bonding
- Electroplating
- Coating of solar cells
- Etching, e.g. for circuit boards
Measuring Options
- Bubble Pressure method: Surface tension (SFT) is measured using the internal pressure of a bubble at an immersed capillary
- Monitoring at a single surface age with evaluation based on predefined limits
- Continuous measurement of SFT while changing the concentration
- Determination of the SFT dependent on surface age between 10 and 30,000 ms
- Temperature measurement and documentation
Specifications:
Serial Number: 30010450
Range of temperature measurement
- 0 to 100 °C
- Resolution 0.1 °C
- Location of temperature measurement sample liquid
Sample Dimensions
- Min. recommended sample volume 15 mL (sample vessel SV23)
Pressure Measurement
- Maximum pressure 1250 Pa
- Precision 2%
Bubble Pressure
- Results dynamic surface tension vs. surface age
- Dynamic surface tension at constant surface age
- Single dynamic surface tension / bath concentration
- Range (surface tension) 10 to 100 mN/m
- Resolution (surface tension) 0.1 mN/m
- Precision (surface tension) 0.5 mN/m
- Range (surface age) 10 to 30000 ms
- Resolution (surface age) 1 ms
Precision (surface age) max. 7.5%
Link for additional information:
